The man, who had a weakened immune system, carried the same strain of COVID-19 since December 2020 …

Antibody tests were not designed to measure COVID-19 vaccine immunity. Dr. Fauci told Insider they …

Some antibody tests had 100% sensitivity, meaning all positive results should be accurate. Others h…

The CDC says the results of these antibody tests shouldn't be used to make important decisions abou…

Asymptomatic people had "weaker" immune responses to COVID-19, and 40% of them had no detectable an…

Coronavirus patients should wait at least three weeks after their symptoms appear to get tested for…

Dozens of antibodies tests have flooded the US, creating concerns among some experts that the kits …

Countries are exploring immunity passports, which would show who has recovered and may be immune, a…

New York Gov. Andrew Cuomo said Sunday that the state is set to start antibody testing to see how m…

A horizontal line across nails (called a Beau's line) can be a sign of other infections too. In the…

The bulk of underreporting likely happened in March, but testing shortages and delays are still cau…

The chance of getting COVID-19 twice this year is low. Most people will have some form of immunity,…

"The problem with antibody testing right now is that we don't know what it means," vaccine scientis…

You should wait at least a couple weeks after getting the coronavirus before taking an antibody tes…

Researchers tested 3,300 Californians for coronavirus antibodies. They found the number of reported…

The funding was not previously disclosed, and the authors reportedly dismissed concerns about a pot…

Spain, France, and the US have likely seen 5% of their populations infected — a far cry from the 50…

Even the most accurate antibody tests can make mistakes, especially when they're used on lots of pe…

The White House believes 200,000 tests per day is enough to reopen the US. Public health and indust…

Three young New Yorkers have been killed by the rare multi-system "inflammatory syndrome," Mayor Bi…