Medically reviewed by Anita C. Chandrasekaran, MD Key Takeaways An ANA blood test is used to find antinuclear antibodies that ...

There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is ...

A hepatitis A (HAV) antibody (AB) total reactive result indicates a current or previous HAV infection, or effective vaccination. The test works by detecting HAV antibodies in a person’s blood. The ...