A. The Country Selection window is used to load data into world atlas displays and populate the Drug Selection table. B. The Drug Selection window is for choosing an FDA-approved drug. ARVs are grouped by type: Protease inhibitors (PI) are colored a light blue, nucleoside/nucleotide reverse transcriptase inhibitors (NRTI) are tan, non-nucleoside reverse transcriptase inhibitors (NNRTI) are coral, integrase inhibitors (II) are light green, and fusion inhibitors (FI) are light magenta. The number of different patient blood samples for a country selected in A is shown. If the “Select All Countries” checkbox is checked, data for all countries are shown. Selection of a drug populates the DRM Selection table with DRM data for that drug, and country if selected. C. The DRM Selection table shows DRMs ordered by their classification. Once a DRM is selected (N88S here) the presence of DRMs in each country are plotted onto the world atlases and the DRM Observation By Country table (D) is populated. The DRM Selection table also has a hyperlink to one or more published papers supporting the DRM. Checkboxes below the title bar enable display of DRMs present in other databases for which no published scientific paper could be identified (designated ambiguous), for showing the Major/Minor DRM classification scheme, and for examining DRMs only in the country selected. D. The DRM Observation By Country table shows a list of the observed DRMs (numerator) and total sequences examined (denominator) for each country. The data are stratified for naïve and treated patients.