Coronavirus

First guests arrive at British quarantine hotels

Britain’s newly established quarantine hotels received their first guests on Monday as the government tries to prevent new coronavirus variants from derailing a fast-moving vaccination drive that has delivered more than 15 million shots in ten weeks.

COVID-19 shots might be tweaked if variants get worse

The makers of COVID-19 vaccines are figuring out how to tweak their recipes against worrisome virus mutations — and regulators are looking to flu as a blueprint if and when the shots need an update.