Glossary

PCR (polymerase chain reaction) –  type of viral load test.

primary mutation – see major mutation.

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.

Stevens-Johnson Syndrome – a type of severe rash that is luckily rare. This rash has been reported in 0.1–0.3% of people using NNRTIs. It can also occur with other drugs including antibiotics (including cotrimoxazole/Septrin). Any rash on an NNRTI should be shown to your doctor to decide whether treatment needs to be switched or can continue.

second-line therapy – the combination of used after your first treatment has failed.