Because foreign virus antigens are expressed in these tumors, persons who are immunosuppressed such as AIDS or transplant patients are at higher risk for these types of cancers.

In addition, virus antigen can be detected double immunodiffusion.

This assay is a more rapid variation of the plaque assay because it uses immunostaining techniques with fluorescently-labeled antibodies specific for the virus antigen to measure host cell infection before an actual plaque is formed.

The blood bank association said its study will test for the virus antigen, a marker that may appear in the blood of an infected person before the antibodies.

Vietnamese ginseng extract showed inhibitory activity on Epstein-Barr virus early antigen (EBV-EA) activation induced by TPA.

Specific antibodies bind only to specific virus antigens, so different types of sensors detect different types of diseases (see How Your Immune System Works to learn more).

Detection of virus antigens can be done by ELISA in tissues and fluids.

This report generated the hypothesis that early antiretroviral treatment (during or very soon after symptomatic seroconversion) allows the incompletely damaged immune system to recover and respond appropriately to virus antigens during treatment interruptions.

Thus, a molecular feature on a virus antigen, an epitope, is a point in shape space.

Impairment of NDV infection would also limit the ability of cytotoxic T cells that target virus antigens to kill virus-infected cancer cells.