Immunizations

LONDON — Mask-wearing will be required on London’s transport network even after the legal obligation to wear them in England is lifted on July 19, the city’s mayor said Wednesday. Sadiq...

How long do vaccines last? That’s now a critical question as the Biden administration prepares to send tens of millions of unused COVID-19 doses abroad to help curb the pandemic. Some state...

LONDON — For Britain, it has been a year of agonizing numbers. Since Prime Minister Boris Johnson plunged the country into lockdown on March 23, 2020, to slow the spread of the coronavirus, the U.K....

CHICAGO — Two Chicago hospital executives have been reprimanded for COVID-19 vaccine events that improperly gave shots to people far from the West Side facility, including one held for workers at...