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Major infectious diseases

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Afghanistan
degree of risk: intermediate (2019)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: Crimea-Congo hemorrhagic fever, malaria (2019)
American Samoa

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Angola
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, typhoid fever (2019)
vectorborne diseases: dengue fever, malaria (2019)
water contact diseases: schistosomiasis (2019)
animal contact diseases: rabies (2019)
Anguilla

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Antigua and Barbuda

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Argentina

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Aruba

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Bangladesh
degree of risk: high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2019)
vectorborne diseases: dengue fever and malaria are high risks in some locations (2019)
water contact diseases: leptospirosis (2019)
animal contact diseases: rabies (2019)
Barbados

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Benin
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: dengue fever and malaria (2019)
animal contact diseases: rabies (2019)
respiratory diseases: meningococcal meningitis (2019)
Bolivia
degree of risk: very high (2019)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2019)
vectorborne diseases: dengue fever and malaria (2019)
Botswana
degree of risk: high (2019)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: malaria (2019)
Brazil
degree of risk: very high (2019)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2019)
vectorborne diseases: dengue fever and malaria (2019)
water contact diseases: schistosomiasis (2019)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Burkina Faso
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: dengue fever and malaria (2019)
water contact diseases: schistosomiasis (2019)
animal contact diseases: rabies (2019)
respiratory diseases: meningococcal meningitis (2019)
Burma
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: dengue fever, malaria, and Japanese encephalitis (2019)
animal contact diseases: rabies (2019)
Burundi
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: malaria and dengue fever (2019)
water contact diseases: schistosomiasis (2019)
animal contact diseases: rabies (2019)
Cambodia
degree of risk: very high (2019)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2019)
Cameroon
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2019)
vectorborne diseases: malaria and dengue fever (2019)
water contact diseases: schistosomiasis (2019)
animal contact diseases: rabies (2019)
respiratory diseases: meningococcal meningitis (2019)
Cape Verde

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Cayman Islands

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Central African Republic
degree of risk: very high (2019)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2019)
vectorborne diseases: malaria and dengue fever (2019)
water contact diseases: schistosomiasis (2019)
animal contact diseases: rabies (2019)
respiratory diseases: meningococcal meningitis (2019)
Chad
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
China
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: Japanese encephalitis (2016)
soil contact diseases: hantaviral hemorrhagic fever with renal syndrome (HFRS) (2016)
Colombia
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: dengue fever, malaria, and yellow fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Congo, Democratic Republic of the
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and trypanosomiasis-gambiense (African sleeping sickness) (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
note - on 18 October 2019, the Centers for Disease Control and Prevention issued a Travel Health Notice for an Ebola outbreak in the South Kivu (Kivu Sud), North Kivu (Kivu Nord), and Ituri provinces in the northeastern part of the Democratic Republic of the Congo; travelers to this area could be infected with Ebola if they come into contact with an infected person’s blood or other body fluids; travelers should seek medical care immediately if they develop fever, muscle pain, sore throat, diarrhea, weakness, vomiting, stomach pain, or unexplained bleeding or bruising during or after travel
Congo, Republic of the
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Costa Rica
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Cote d'Ivoire
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Croatia
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
Cuba
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Djibouti
degree of risk: high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever (2016)
Dominica

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Dominican Republic
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

East Timor
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
Ecuador
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Egypt
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
water contact diseases: schistosomiasis (2016)
El Salvador
degree of risk: high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Equatorial Guinea
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
animal contact diseases: rabies (2016)
Eritrea
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
Estonia
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
Ethiopia
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Fiji

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Gabon
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Gambia, The
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Ghana
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Grenada

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Guatemala
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Guinea
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
aerosolized dust or soil contact diseases: Lassa fever (2016)
Guinea-Bissau
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Guyana
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Haiti
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Honduras
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Hungary
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
India
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2016)
water contact diseases: leptospirosis (2016)
animal contact diseases: rabies (2016)
Indonesia
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
Iran
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: Crimean-Congo hemorrhagic fever (2016)
Iraq
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
Jamaica

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Kenya
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Laos
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
Latvia
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
Liberia
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
aerosolized dust or soil contact diseases: Lassa fever (2016)
Lithuania
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
Madagascar
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Malawi
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Malaysia
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: dengue fever (2016)
water contact diseases: leptospirosis (2016)
Mali
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Marshall Islands

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Mauritania
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Mexico
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Micronesia, Federated States of

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Montenegro
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: Crimean-Congo hemorrhagic fever (2016)
Mozambique
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Namibia
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria (2016)
water contact diseases: schistosomiasis (2016)
Nepal
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: Japanese encephalitis, malaria, and dengue fever (2016)
New Caledonia

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Nicaragua
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Niger
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Nigeria
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: leptospirosis and schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
aerosolized dust or soil contact diseases: Lassa fever (2016)
note - on 7 October 2019, the Centers for Disease Control and Prevention issued a Travel Health Notice for a Yellow Fever outbreak in Nigeria; a large, ongoing outbreak of yellow fever in Nigeria began in September 2017; the outbreak is now spread throughout the country with the Nigerian Ministry of Health reporting cases of the disease in all 36 states and the Federal Capital Territory; the CDC recommends travelers going to Nigeria should receive vaccination against yellow fever at least 10 days before travel and should take steps to prevent mosquito bites while there; those never vaccinated against yellow fever should avoid travel to Nigeria during the outbreak
Pakistan
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
animal contact diseases: rabies (2016)
Panama
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Papua New Guinea
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Paraguay
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Peru
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever, malaria, and Bartonellosis (Oroya fever) (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Philippines
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
water contact diseases: leptospirosis (2016)
note - on 8 October 2019, the Centers for Disease Control and Prevention issued a Travel Health Notice regarding a polio outbreak in the Philippines; CDC recommends that all travelers to the Philippines be vaccinated fully against polio; before traveling to the Philippines, adults who completed their routine polio vaccine series as children should receive a single, lifetime adult booster dose of polio vaccine
Poland
degree of risk: intermediate (2016)
vectorborne diseases: tickborne encephalitis (2016)
Puerto Rico

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Russia
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: tickborne encephalitis (2016)
Rwanda
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
animal contact diseases: rabies (2016)
Saint Barthelemy

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Saint Lucia

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Saint Martin

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Saint Vincent and the Grenadines

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Samoa

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Sao Tome and Principe
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
Senegal
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Serbia
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea (2016)
Sierra Leone
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
aerosolized dust or soil contact diseases: Lassa fever (2016)
Singapore

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Somalia
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: dengue fever, malaria, and Rift Valley fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
South Africa
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
water contact diseases: schistosomiasis (2016)
South Sudan
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, trypanosomiasis-Gambiense (African sleeping sickness) (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Sri Lanka
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2016)
vectorborne diseases: dengue fever (2016)
water contact diseases: leptospirosis (2016)
animal contact diseases: rabies (2016)
Sudan
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Suriname
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Swaziland
degree of risk: intermediate (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria (2016)
water contact diseases: schistosomiasis (2016)
Tajikistan
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria (2016)
Tanzania
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016)
water contact diseases: schistosomiasis and leptospirosis (2016)
animal contact diseases: rabies (2016)
Thailand
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea (2016)
vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2016)
Togo
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and yellow fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
respiratory diseases: meningococcal meningitis (2016)
Tonga

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Trinidad and Tobago

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Turks and Caicos Islands

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Uganda
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016)
vectorborne diseases: malaria, dengue fever, and trypanosomiasis-Gambiense (African sleeping sickness) (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Venezuela
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea and hepatitis A (2016)
vectorborne diseases: dengue fever and malaria (2016)

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Vietnam
degree of risk: very high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever, malaria, and Japanese encephalitis (2016)
Virgin Islands

note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus

Yemen
degree of risk: high (2016)
food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: dengue fever and malaria (2016)
water contact diseases: schistosomiasis (2016)
Zambia
degree of risk: very high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)
Zimbabwe
degree of risk: high (2016)
food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016)
vectorborne diseases: malaria and dengue fever (2016)
water contact diseases: schistosomiasis (2016)
animal contact diseases: rabies (2016)

Source: CIA Factbook