By UPTODATE: Group M ("Main") HIV is considered the pandemic strain and comprises the vast majority of strains of HIV, whereas the other groups have much more limited geographic distribution. Viruses from group M are subsequently divided into nine distinct subtypes or clades (A-D, F-H, J-K) and recombinants of the subtypes, termed circulating recombinant forms (CRFs). The 4th gen test is fine.
Answered 10/29/2021
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