The US Food and Drug Administration on Wednesday authorized Novavax's Covid-19 vaccine for emergency use in adults. It is the fourth coronavirus vaccine available in the United States, and it uses a different type of vaccine technology than the shots already available.

The number of monkeypox vaccine doses distributed across the United States has more than tripled since last week, according to the US Department of Health and Human Services, but supply falls far short of demand -- and short of the levels that experts say will be needed to control the outbreak.

WASHINGTON — The Biden administration is calling on people to exercise renewed caution about COVID-19, emphasizing the importance of getting booster shots for those who are eligible and wearing masks indoors as two new highly transmissible variants are spreading rapidly across the country.

Even as we look forward to enjoying this summer, the youth mental health crisis, mass shootings and political polarization have plunged many into distress and despair.