Glossary

viral tropism see tropism.

cross-over study – where patients in a study ‘roll-over’ to a second related study. For example, this can be after a fixed period in a study (ie after 48 weeks) or after another event (for example, not having a treatment response).

Peripheral arterial disease refers to a narrowing or hardening (atherosclerosis) in the arteries in the arms or legs.

See: atherosclerosis

HIV – Human Immunodeficiency Virus

X-ray – an abbreviation for x-radiation. An X-ray lung scan is a common way to look for evidence of TB infection. X-rays can also diagnose bone fractures.