Glossary

T-cell – a type of white blood cell (lymphocyte) that are part of the immune system and that mature in the thymus (T). CD4 cells are also called T-cells.

bDNA – branched DNA. A type of viral load test.

PrEP (Pre-Exposure Prophylaxis) – using HIV drugs before sex (and after) to stop the chance of infection.

• UK guide to UK – a 24-page i-Base guide covering PrEP in detail.
  How to use PrEP. Buying PrEP online. Essential monitoring tests. Dosing options including both daily and on-demend dosing. Getting PrEP in the UK. Tips for adherence. Links for further information.
• PrEP in Scotland – New version of the PrEP guide for people in Scotland, where PrEP is available on the NHS.
• Pocket guide to PrEP – easy guide on PrEP and how to use it.
• Buying generic PrEP online. Q&A on buying generic PrEP in the UK.
• Reports and articles about all aspects of PrEP. Includes updates on access to PrEP in the UK and latest research into new drugs.

publication bias – the tendency for published results to be different to other trials. For example, trials that show a positive effect are more likely to be reported and published than trials that find no effect.

brand name drug – drug supplied under a marketing name. Brand name drugs are usually protected by patents, but some generic drugs also have brand names