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 ...

"We feel this pressure because we want to help people." Antibody tests, which reveal whether someone has been infected with the novel coronavirus, have been touted as key to reopening the economy and ...

A non-reactive result from an HIV test means that you tested negative for human immunodeficiency virus (HIV). In most cases, that means you don't have a detectable infection. In some cases, though, ...

Whether you're welcoming home a new baby, flying to a new destination for a vacation or working around sick patients as a doctor or nurse, your immunity is your invisible armor against all the bugs ...

There's new evidence that connects testing positive for COVID-19 antibodies from a prior infection with a significantly lower risk of becoming infected again in the future. A study, published in the ...

Antibodies are best known for their ability to latch onto and neutralize bacteria, viruses and other pathogens. But these immune proteins can do more than that: They also activate other components of ...