Glossary

opportunistic infection (OI) – an infection that occurs after your immune system has been damaged by HIV.

OI chapter of the training manual.

nucleotide – the building blocks of the genetic code (DNA/RNA). Also called a base.

IQR (inter-quartile range) – when using (median) average, the IQR gives an indication of the spread or range of results. Each quartile (1st, 2nd, 3rd and 4th) represents 25% of the results. The IQR represents the middle 50% of the results. See also range.

treatment-experienced – someone who has previously used anti-HIV treatments.

cross-resistance – when resistance to one drug causes resistance to other similar drugs.

This commonly happens for every class or family of HIV drugs: nukes, NNRTIs, PIs, integrase inhibitors and entry inhibitors.