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Glossary

Selected words and phrases

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

monoinfection – infection with only one virus

axis – line on a graph to measure data. Graphs usually have a vertical axis (y-axis) and horizontal axis (x-axis). An axis should show what is being measured and the units of measurement, eg ‘time (in minutes)’.

surrogate marker – A surrogate marker is when something that is easy to measure is used as a marker for something that is difficult to measure directly.

The CD4 count doesn’t directly measure HIV. But it is a good surrogate (or indirect) marker for how HIV has damaged your immune system. It is closely linked to the risk of HIV-related complications.

Viral load in blood is a good surrogate marker for levels of HIV in your body overall including in other body sites.

BD (or bid) – a short hand term for medication dosing that means ‘twice-daily’.

See also q12H.