1 Unsparing, harsh, or strict, as in treatment of others: a severe critic. 2  Marked by or requiring strict adherence to rigorous standards or high principles: a severe code of behavior. 3  Stern or forbidding, as in manner or appearance: spoke in a severe voice. 4  Extremely plain in substance or style: a severe black dress.
The most common HIV test is the antibody screening test (immunoassay), which tests for the antibodies that your body makes against HIV.The immunoassay may be conducted in a lab or as a rapid test at the testing site.hese tests cost more than antibody tests and are generally not used as a screening test, although your doctor may order one as a follow-up test, after a positive antibody test, or as part of a clinical workup. To learn more about HIV tests that are FDA-approved for use in the United States, visit CDCâs U.S. HIV tests.
1 Combination tests have been developed that detect HIV antibody and the HIV antigen called the p24 antigen. 2  Levels of p24 antigen are typically high early in the course of infection. 3  A combination test may be performed to increase the likelihood that HIV infection is detected sooner after exposure occurs.ince there is no cure, early treatment of HIV infection and immune system monitoring can greatly improve long-term health and survival. Also, if a person knows his HIV status, it may help change behaviors that can put him and others at risk. Screening. Different types of antibody tests may be used for HIV screening: