SAN FRANCISCO -- The recent outbreak of the omicron variant has many people running for the store for an over-the-counter rapid test. But simply taking the test once isn't enough to tell you if you ...

Welcome to what some experts say is the country’s second largest COVID wave since the start of the pandemic. In the past few weeks, there’s been a striking increase in new cases, hospitalizations, and ...

There are some rapid tests you might be able to take past the expiration date on the box. Here's what to know. NBC Universal, Inc. At-home COVID-19 tests have become commonplace for many households, ...