Add Yahoo as a preferred source to see more of our stories on Google. There are certain things antibody tests can (and cannot) tell us about our immunity to COVID-19. (Photo: Yulia Reznikov via Getty ...

LOS ANGELES -- U.S. regulators issued new guidance this week shortening the time that people who received Moderna or Pfizer's COVID-19 vaccine have to wait for a booster, and it's different than the ...

The FDA has issued emergency authorizations to 12 antibody tests for the virus. As federal officials gradually begin reopening the country, expanded testing is central to the conversation. Until now, ...

If you are looking for a single magical number to tell whether you can be more lax on Covid-19 precautions, sorry, but the level of antibodies in your blood is not going to provide it. Antibodies aren ...

ATLANTA — Covid-19 vaccine booster shots are going into arms across the nation, and some people are turning to the Verify team asking whether they can check their immunity before getting another dose.

As the world continues to navigate the aftermath and lingering presence of COVID-19, one question remains as relevant as ever: Which COVID-19 test is right for me—diagnostic or antibody? Whether ...

A type of COVID-19 test rushed out in the early days of the pandemic, before vaccines became widely available, isn’t much use any more for most people, doctors say. So-called antibody blood tests can ...

Such a treatment also may help determine how many people were exposed. With a limited supply of COVID-19 tests in the United States, people with mild symptoms are less likely to be tested, leaving ...

LOS ANGELES -- U.S. regulators issued new guidance this week shortening the time that people who received Moderna or Pfizer's COVID-19 vaccine have to wait for a booster, and it's different than the ...