Glossary

secondary mutation – see minor mutation.

quantitative (in a study) – where what is being measured has a numerical value or fits a pre-defined scale or range of responses.

recency HIV test – this is a type of HIV test that can indicate whether you recemtly became HIV positive. This is defined as being the last six months.

It is sometimes called a detuned or RITA test (Recent Infection Treatment Algorithm). In the UK, this test is used to be called STARHS (Serological Testing Algorithm for Recent HIV Seroconversion).

It is also sometimes called a de-tuned or recency HIV test.

See this Q&A on RITA testing.

half-life (T1/2) – the time taken a drug to clear from the highest concentration to half this level. Drugs have different half-lives in different compartments (ie half-life in blood can be different from the half-life inside a cell). It take 5 x the half-live for a drug to be considered cleared.

RNA – an abbreviation for the scientific word for genetic material found in some types of viruses. It is the abbreviation for ribonucleic acid. It is very similar to DNA but is single-strand rather than the double-strand in DNA. See DNA.