SAN FRANCISCO -- As California becomes the first U.S. state to adopt an "endemic" approach to COVID-19, we take a closer look at what becoming "endemic" means and if virus levels have truly ...

SAN FRANCISCO -- California Health and Human Services Agency Sec. Dr. Mark Ghaly announced Monday that although the indoor mask mandate will be lifted for vaccinated people on Feb. 16, it will remain ...

Jonathan Levin, the newly appointed president of Stanford, seen here speaking at a forum at the university's business school in April, when he was the school's dean. Was his hope fulfilled that a ...

People who don't trust scientists. Nations that don't trust each other. And a lab in a suitcase. These are some of the ways the world has changed – for worse and for better – in the wake of the ...

Dr. Chan is a molecular biologist at the Broad Institute of M.I.T. and Harvard, and a co-author of “Viral: The Search for the Origin of Covid-19.” This article has been updated to reflect news ...

“They’re coming in and they don’t know how to play.” “I had some kids who went on to kindergarten who still did not know a triangle.” “I can’t tell you the number of families who say their kids are ...