Fig. 2From: HIV-1 drug resistance testing is essential for heavily-treated patients switching from first- to second-line regimens in resource-limited settings: evidence from routine clinical practice in CameroonHIV-1 drug resistance mutations according to major subtypes distribution. Legend. CRF02_AG: circulating recombinant form; non-CRF02_AG: other subtypes other than CRF02_AGBack to article page