Glossary

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

phenotype — relating to how an organism behaves, based on how its genotype relates to the environment. Phenotypic resistance tests look at whether HIV continues to grow in a test tube after increasing concentrations of a drug are added. See genotype.

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.

haematology – study (-ology) of blood (haema-)

EVR (early virological response) – a 99% (2-log ) drop in HCV viral load after 12 weeks of HCV treatment.