CD4% – percentage of total lymphocytes (white blood cells) that are CD4 cells.
The CD4% is generally more stable than the CD4 count. For example, if you ever get a CD4 count that is much lower than you expect, first see whether the CD4% has changed too,
If the CD4% is still roughly the same then the low CD4 count is unlikely to show a real change.
microbicide – a gel that may protect against infection.In reference to HIV, this is usually referring to a gel that could be applied before sex. In 2010 a study called Caprisa 004 provided the first evidence that a microbicide (in this case a gel containing the HIV drug tenofovir) might protect against HIV infection.
bDNA – branched DNA. A type of viral load test.
partially active – the HIV treatment in question will work against this virus but this is reduced compared to wild-type HIV. This is the same as partial resistance, or intermediate resistance etc.
mutation – a change in the genetic structure of an organism (including a virus like HIV). See resistance.