Preliminary data from researchers in China suggest the NB.1.8.1 variant is not better at evading the immune system compared to other strains on the rise, but it does have a greater ability to bind to human cells, suggesting it could be more transmissible.

Historically, almost everyone has been eligible for Covid vaccines; the C.D.C. recommended the most recent vaccine for all Americans over 6 months of age.

The US Food and Drug Administration will now require Covid-19 vaccines from Pfizer/BioNTech and Moderna to use expanded warning labels with more information about the risk of a rare heart condition after vaccination.

Theatre nurse David Collyer wanted to shoot a documentary photography project in the last years of the Welsh hospital he worked in. Then Covid-19 appeared.

Government vaccine advisers are meeting to decide if the recipe for COVID-19 vaccines needs updating for this fall and winter.

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.

Plus, new clues about the rise in colorectal cancer rates in young adults. You are reading our weekly Well+Being newsletter. Sign up here to get it delivered to your inbox every Thursday.

Federal health officials will no longer routinely approve annual COVID-19 shots for younger adults and children who are healthy