<unk>  is a measure of the severity of a<unk>  infection, and can be calculated by estimating the amount of virus in an involved body fluid, for example, it can be given in RNA copies per milliliter of blood plasma. Determination of<unk>  is part of the therapy monitoring during chronic<unk>  infections and in immunocompromised patients, e.g. after bone marrow or solid organ transplantation. Currently, routine testing is available for HIV-1, cytomegalovirus, hepatitis B virus, and hepatitis C virus.
Viral load
Nucleic acid test
Molecular microbiology
Hepatitis B surface antigen
HIV resistance testing
DNA sequencing
Microbiology
Enzyme assay