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, ...

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.

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 ...

The test measures immunoglobulin G antibodies, which indicate past exposure or vaccination to viruses like measles.

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 ...