In a major policy shift, federal health officials anticipate the shots will be made available to adults 65 and older as well as children and younger adults who have one or more risk factors that make them more vulnerable to severe COVID-19.

Until now, federal guidance has recommended that everyone six months or older receive a COVID-19 vaccine targeting the latest circulating version of the virus to maximize their ch

The US Food and Drug Administration is changing the way it approves Covid-19 vaccines for Americans. The agency is changing the standard of evidence required for Covid-19 vaccine approval in the US, Dr.