Zambia - Prevalence of HIV, total (% of population ages 15-49)

Prevalence of HIV, total (% of population ages 15-49) in Zambia was 11.30 as of 2018. Its highest value over the past 28 years was 16.70 in 1998, while its lowest value was 10.10 in 1990.

Definition: Prevalence of HIV refers to the percentage of people ages 15-49 who are infected with HIV.

Source: UNAIDS estimates.

See also:

Year Value
1990 10.10
1991 11.80
1992 13.30
1993 14.50
1994 15.50
1995 16.10
1996 16.50
1997 16.70
1998 16.70
1999 16.50
2000 16.20
2001 15.90
2002 15.40
2003 14.90
2004 14.50
2005 14.10
2006 13.80
2007 13.50
2008 13.30
2009 13.10
2010 13.00
2011 12.90
2012 12.70
2013 12.50
2014 12.30
2015 12.10
2016 11.80
2017 11.60
2018 11.30

Limitations and Exceptions: The limited availability of data on health status is a major constraint in assessing the health situation in developing countries. Surveillance data are lacking for many major public health concerns. Estimates of prevalence and incidence are available for some diseases but are often unreliable and incomplete. National health authorities differ widely in capacity and willingness to collect or report information.

Statistical Concept and Methodology: HIV prevalence rates reflect the rate of HIV infection in each country's population. Low national prevalence rates can be misleading, however. They often disguise epidemics that are initially concentrated in certain localities or population groups and threaten to spill over into the wider population. In many developing countries most new infections occur in young adults, with young women especially vulnerable. Data on HIV are from the Joint United Nations Programme on HIV/AIDS (UNAIDS). Changes in procedures and assumptions for estimating the data and better coordination with countries have resulted in improved estimates of HIV and AIDS. The models, which are routinely updated, track the course of HIV epidemics and their impact, making full use of information in HIV prevalence trends from surveillance data as well as survey data. The models take into account reduced infectivity among people receiving antiretroviral therapy (which is having a larger impact on HIV prevalence and allowing HIV-positive people to live longer) and allow for changes in urbanization over time in generalized epidemics. The estimates include plausibility bounds, which reflect the certainty associated with each of the estimates.

Aggregation method: Weighted average

Periodicity: Annual


Topic: Health Indicators

Sub-Topic: Risk factors