Medically reviewed by Renita White, MD A non-reactive HIV test result usually means you don't have HIV. Retesting may be necessary because of inaccurate results during the window period. HIV antibody ...

Receiving a non-reactive HIV test result brings immense relief for most people, but understanding what this outcome truly means requires more than a simple celebration. While a negative result ...

Hepatitis A blood tests check for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. An IgG-positive and IgM-negative result may suggest immunity to hepatitis A. A doctor may request a ...

I am responsible for the care of HIV-infected and exposed children at my hospital in Curicica, Rio de Janeiro, Brazil. We have about 70 infected children. I care for an 11-year-old girl who was ...

The hepatitis A virus (HAV) antibody (AB) total test identifies both types of antibodies that the body produces in response to HAV infection. A reactive result means the test has detected HAV ...

A rheumatoid factor (RF) test detects rheumatoid factor, a type of antibody (proteins that fight off harmful substances) in your blood. RF antibodies sometimes attack healthy cells and tissues, ...