Two types of COVID-19 tests, the rapid antigen test and the polymerase chain reaction (PCR) test, are available in the United States. The PCR typically relies on lab testing and is still considered ...

The question quickly arose whether existing rapid antigen tests could detect newly emerging variants. Using clinical samples obtained from diagnostic labs throughout the U.S. from 2020 to 2023, the ...

Peek in medicine cabinets across the U.S. and you’ll find stacks of leftover COVID-19 tests. When symptoms arise, so do questions: When should I test? How accurate is it really? And what should I do ...

In a study involving nearly 1,000 patients seen at the Baltimore Convention Center Field Hospital (BCCFH) during a five-month period in 2022—researchers at Johns Hopkins Medicine, the University of ...

With Covid-19 cases up across the country, many people are once again relying on home tests to guide decisions about going to work and sending their kids to school and other activities. A lot of those ...

Molecular tests are far superior to rapid antigen tests—and now you can get them for home use. Amanda Blum is a freelancer who writes about smart home technology, gardening, and food preservation.

They can result in false negatives, but they remain a valuable tool in stopping the spread of Covid-19. Here’s how to use them most effectively. By Dana G. Smith We’ve all heard the anecdotes: Your ...

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Select independently determines what we cover and recommend. When you buy through our links, we may earn a commission. Learn more. At-home Covid tests can diagnose infection and are in stock now ...