Glossary

ritonavir – a protease inhibitor (PI) that is now used boost levels of some other  HIV drugs, especially other PIs.

confirmatory test – a second test to double-check the results of a previous one. For example, if your viral load is usually undetectable and then becomes detectable, you need a second confirmatory test. This is to check that the detectable result was not a laboratory error on just a temporary blip.

TasP (Treatment as Prevention) – a term to emphasise the impact that HIV drugs (ART) has on dramatically reducing the chance of HIV transmission.

ART is firstly for the health of the HIV positive person. But having an undetectable viral load on ART makes it so difficult to transmit HIV that the risk gets so close to zero that it is effectively zero.

For example, in the PARTNER study, nearly 900 couples had sex more than 58,000 times without condoms, without any transmissions. Each couple included one person who was HIV positive with an undetectable viral load on ART and one person who was HIV negative. ZERO transmissions.

interaction – when two drugs react to increase or decrease one or both drugs, often in ways that are unexpected or potentially harmful.

chronic – long-term.