Surveillance of acquired HIV drug resistance in populations receiving ART
The surveillance of acquired HIV drug resistance provides critical information to assess the performance of antiretroviral treatment (ART) programmes in achieving viral load suppression targets. Surveillance data also describe resistance patterns in populations receiving ART, which inform the selection of optimal ART regimens.
WHO recommends 3 survey methods to monitor the prevalence of acquired HIV drug resistance:
- nationally representative laboratory-based method;
- nationally representative clinic-based method; and
- sentinel laboratory-based method.
Both nationally representative methods generate estimates of acquired HIV drug resistance among people with viral non-suppression (≥1000 copies/ml) taking dolutegravir-containing and non-dolutegravir-containing ART. The sentinel method focuses on HIV resistance to dolutegravir among individuals receiving dolutegravir-containing ART with confirmed viral non-suppression.
Concept notes and toolkits are available below for each survey method.
WHO's recommended survey methods
Also available in Spanish
Laboratory-based survey of acquired HIV drug resistance using remnant viral load specimens

Toolkit: implementation of the laboratory-based survey of acquired HIV drug resistance using remnant viral load specimens
Online sample size calculators
HIV drug resistance database
Stata code for data analysis
Clinic-based survey of acquired HIV drug resistance

Clinic-based survey of acquired HIV drug resistance
Toolkit: implementation of the clinic-based survey of acquired HIV drug resistance
Online sample size calculators
HIV drug resistance database
Stata code for data analysis
Sentinel surveys of acquired HIV resistance to dolutegravir among people receiving dolutegravir-containing antiretroviral therapy
Publication
Toolkit: implementation of the sentinel survey of acquired HIV drug resistance
Template to enter and upload the data
HIV drug resistance surveillance database
Stata code for data analysis
WHO regularly produces a global report on HIV drug resistance threats, prevalence and trends, based on information shared by countries. Click here to see the reports.