Index:   Untitled SA - SG     Untitled SH - SR     Untitled ST - SZ    
  • Subtype (Clade): SFAF
    a phylogenetically distinct strain of a microorganism. There are at least 11 subtypes of HIV-1 classified into 2 groups: group M (containing subtypes A through J) and group O. Subtype B is predominant in the U.S. There are 5 known subtypes of HIV-2 (A-E). See also strain.

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