Add Yahoo as a preferred source to see more of our stories on Google. For any American wondering if they have Covid-19, there are two kinds of tests available: polymerase chain reaction (PCR) and ...

“It started as a joke, actually,” Elena Korngold told me. But late last month, the 40-something radiologist from Portland, Oregon, and her family decided that their unsanctioned scheme couldn’t hurt.

Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...

Add Yahoo as a preferred source to see more of our stories on Google. Over-the-counter multiplex tests for more than one illness may soon come to a pharmacy near you. Paco Burgada/iStock via Getty ...

Researchers from Johns Hopkins Medicine and collaborating institutions report that a rapid antigen test for SARS-CoV-2—the virus that causes COVID-19—proved highly accurate when compared to the ...

As people use at-home rapid tests more and more, they're noticing some idiosyncrasies with the results. Here's the latest research examining the accuracy of these tests. The federal government's ...

At-home rapid COVID-19 tests can reveal more about viral load than a simple positive/negative result, according to experts. "By definition, the basic technology suggests that you somehow have to go ...

The COVID-19 pandemic has created a slew of different must-have products. Early on it was toilet paper and paper towels, then it seguee into cleaning supplies, hair clippers, and bread makers. Now ...

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What does it mean if a person's rapid antigen test result comes back positive after five days of isolation due to COVID-19? According to the experts, that person is most likely still carrying a viral ...