Each antibody guards against its target antigen, and many types of antibodies are found throughout your body. They play a vital role in your body’s defense against illness and disease.

An antibody can recognize and bind to an antigen in a specialized lock-and-key manner. This binding triggers the body’s immune response and mobilizes other cells to fight the invading antigen.

Antigen tests In theory, antigen tests can be used to screen individuals infected with the virus, but these tests did not become FDA authorized until May 8. Emergency use authorization was granted ...

A nurse practitioner administers COVID-19 tests in the parking lot at Brockton High School in Brockton, Mass., on Aug. 13, 2020. Boston Globe via David L. Ryan—The Boston Globe/Getty Images ...

Antibody tests A woman's blood is collected for testing of coronavirus antibodies at a drive through testing site in Hempstead, N.Y., Tuesday, April 14, 2020. Seth Wenig/AP What are they?

On Monday, the FDA announced that companies have 10 days to prove the accuracy of their antibody tests or risk removal from the market. Antigen testing: the path to reopening America ...

Osaka Metropolitan University scientists discovered the principle of light-induced acceleration of antigen–antibody reaction, allowing for simple, ultrafast, and highly sensitive detection of ...