Glossary

virology – the study of viruses.

nucleus – the central part of some cells that contains DNA.

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.

PCP – pneumocystis jiroveci (new) or pneumocystis carinii (old). A fungal infection that causes pneumonia.

PCP section of the training manual.

study population – the group of people in a study.