| 12 patterns of major drug resistance mutations (defined here) from 25291 clinical isolates obtained from 23759 persons infected with HIV-1 Group M virus are arranged in decreasing prevalence in the table (updated on 2025-9-10). Sequences containing a mixture at one of the major drug resistance positions were excluded from the table. For each pattern, drug susceptibility data on isolates matching the specific mutation pattern is shown on the left side. The number of sequences with each pattern is indicated, as well as the median fold resistance, as assayed by the ViroLogic PhenoSense assay, to each of several individual members of the selected drug class.
 Subscripts indicate the number of sequences assayed for resistance to the designated drug. Data is also available for download in a tab-delimited format. Interquartile ranges are available by clicking here.
Data on the 30 most common mutation patterns is also available in a PDF format.
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