The ANA blood test is used to detect the presence of antinuclear antibodies which may be associated with specific autoimmune diseases.

Learn about the definitions of antibodies and antigens and the role they both play in HIV infection.

Research have identified neutralizing antibodies, which stop the SARS-CoV-2 from binding to our cells, in the blood of many recovered patients. Learn what this means for treatment methods, like vaccines.

Biological medical therapy, or biologics, has been increasingly used to treat lupus and its symptoms. Learn more about using biologics for lupus.

Learn how the cPass COVID-19 antibody test is different from other antibody tests with emergency use authorization from the FDA.

Antibody tests can be useful to confirm a prior COVID-19 infection, but this method is not completely reliable or accurate.

Tests for Lyme disease look for antibodies or bacterial DNA associated with this tick-borne infection. Learn what to expect.

There is no one test that can diagnose autoimmune diseases, but some lab tests can show an inflammatory process and help with the diagnosis.

The FDA has authorized a point-of-care antibody test for COVID-19 that can be done in a provider's office. The fingerstick test providess a result in just 15 minutes.

President Trump received an 8 gram dose of Regeneron's experimental polyclonal antibodies Friday afternoon after he tested positive for COVID-19. Here's what we know.