coronavirus tests

The Centers for Disease Control and Prevention issued a new testing mandate for U.K. travelers coming into the U.S. after an outbreak of a new coronavirus variant in England.

Musk was using the less-accurate rapid antigen tests. He said something "bogus" was happening and is waiting results from a test that is considered more reliable but takes longer to process.

If you want to socialize with family or friends — say share a vacation cabin — can testing in advance keep everyone safe? We asked experts how diagnostic tests work and how to interpret the results.

The National Institutes of Health is giving $248.7 million dollars to seven companies developing new technologies for testing, including use of the revolutionary gene-editing technique CRISPR.