A

A
gen.	statement

subgroup of genetically related HIV 1 viruses HIV 1 can be classified into four groups M Group N Group O Group and P Group Viruses within each group can then be further classified by subtype For example the HIV 1 M group includes at least nine subtypes | A

A
gen.	statement

1 | A

A
gen.	statement

2 B C D F 1 F 2 G H J and K