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 ...

This holiday season, we are all itching for a little bit of normalcy. For many, this means spending time with family and friends, and dropping the masks to drink eggnog. But even if you are fully ...

At-home COVID-19 tests have become commonplace for many households, but knowing when exactly to take a rapid test — or when to throw old ones out — isn't always straightforward. Here's what health ...

As the various subvariants of omicron continue to circulate in the U.S., rapid at-home tests remain an important tool for protecting yourself and others. Home tests are appealing because they allow ...

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Facing long lines and shortages of home test kits during the latest surge, people are searching for answers about Covid tests. By Tara Parker-Pope Dani Blum and Nicole Stock Testing is essential to ...

Other countries are awash in Covid tests. The U.S. is not. By David Leonhardt Your daughter wakes up with a scratchy throat, and you can’t decide whether she should go to school. You can’t shake a ...