To quickly confirm an asymptomatic case of COVID-19, a second rapid test within an hour of a positive result can boost the accuracy of the result from 38 percent to 92 percent, according to a new ...

Add Yahoo as a preferred source to see more of our stories on Google. As the federal health emergency ended May 11 and COVID numbers are on the rise, here’s how you can still access tests, at-home and ...

The Food and Drug Administration (FDA) issued guidance on Thursday recommending that people testing themselves for COVID-19 at home take a repeat test within 48 hours to rule out a potential false ...

This decision, well within current norms for care, was nonetheless consequential: The president was forced to cancel a trip to advocate for legislation in support of the domestic semiconductor ...

It may be best to repeat an early COVID-19 antigen a test a day or two later for symptomatic individuals who have negative results, the authors of a new study say. Investigators from federal and state ...

Many of us are hearing stories lately about friends, neighbors and family members testing positive for the COVID-19 virus, even though official case numbers are likely being undercounted. Health ...

With COVID-19 infections on the rise in the United States, people exhibiting respiratory symptoms are more likely to seek a test. Now that the disease is in its endemic stage, testing looks different ...

Q: In most cases, we will repeat the RT-PCR test on the assumption that the original test was conducted too soon or got contaminated. Adding the PCR antibody testing could tell us a little more about ...

Ducharme is a contributor to TIME. A medical worker performs a COVID-19 test at a screening center in Saint-Denis, France, on Nov. 4, 2020. Ducharme is a contributor to TIME. If you had COVID-19 ...

New findings demonstrate how the rapid antigen test can be used to triage healthcare workers for returning to work during periods of acute staffing shortages during COVID surges. They also show that a ...

NPR's Mary Louise Kelly talks with Dr. Wilbur Lam, a lead investigator assessing COVID-19 diagnostic tests for the U.S. government, about detecting the omicron BA.2 subvariant with rapid tests. The ...