Early research in the United States, the United Kingdom, and Israel is examining how Covid-19 vaccines perform in real-world settings—and the results offer tantalizing hints about the vaccines' effectiveness after a single dose and against emerging coronavirus variants.

It can be challenging to deliver negative feedback, especially to someone in a position of authority. Here are a few key steps you can take to prepare and deliver a critique to your superiors at work, Tijs Besieux writes for the Harvard Business Review.

Doctors are reporting an increase in the number of children and adolescents with MIS-C, an inflammatory syndrome related to the novel coronavirus—and they're struggling to understand why the condition is surging even as U.S. coronavirus cases are falling steeply.

Researchers say they've identified a new coronavirus variant in New York City that could be less susceptible to current vaccines, adding to worries that new variants could threaten progress against the pandemic. Here's how drugmakers are scrambling to tweak and test their Covid-19 vaccines against new variants.

Citing "greatly changed circumstances," the Biden administration on Monday asked the Supreme Court to not hear oral arguments in a case challenging states' Medicaid work requirements that had been advanced under former President Donald Trump's administration, in today's bite-sized hospital and health industry news from the District of Columbia, Georgia, and New York.