Some COVID-19 patients are testing positive after recovering in Asia, but experts say the presence of antibodies should guarantee short-term immunity ...

SAN FRANCISCO -- There has been a lot of talk about testing for the coronavirus, but you may not entirely understand what the different tests are for. The coronavirus makes some people sick, some ...

Following a summer uptick of COVID-19 infections, Americans are now able to order free COVID-19 tests starting Thursday. The ...

A T-cell test developed by Adaptive Biotechnologies could become the first commercially available test of its kind, and it may be more effective at detecting past COVID-19 infections than antibody ...

STATEN ISLAND, N.Y. — With the terrifying coronavirus (COVID-19) pandemic of 2020 behind us and the world now returned to normal, many people have moved away from vaccination or even testing for the ...

Add Yahoo as a preferred source to see more of our stories on Google. As we get into another winter holiday season, COVID is still part of our lives. And although it's hard to predict exactly what ...

The Biden administration next month will relaunch a program for every American to order free COVID-19 tests through the mail, officials said. Administration officials said during a briefing Friday ...

Statewide blood testing for COVID-19 has found that only 2% of Virginians had antibodies to the virus as of mid-August. The result has prompted the researchers to conclude that herd immunity in ...

During the COVID-19 pandemic, at-home antigen tests became widely accepted for detecting infection. In a new study, researchers looked into the benefits of using at-home antibody tests to detect ...

On the heels of a summer wave of COVID-19 cases, Americans will be able to get free virus test kits mailed to their homes, starting in late September. U.S. households will be able to order up to four ...

Among patients going to hospitals and clinics, there is an undercurrent of worry: “Could I catch COVID by being here, among sick people?” But doctors encourage patients not to postpone needed care, ...

SAN FRANCISCO -- It's a story that has been making headlines across the United States: Did Californians develop herd immunity after possibly being exposed to novel coronavirus last year? On Thursday, ...