With the U.S. Health and Human Services Secretary Robert F. Kennedy, Jr. canceling nearly $500 million in mRNA vaccine research contracts on Tuesday, you may be wondering if mRNA vaccines are safe.

The U.S. approved a new COVID-19 vaccine made by Moderna late Friday but with limits on who can use it — not a replacement for the company's existing shot, but a second option. The new vaccine, ...

EDITOR’S NOTE: This story has been updated to reflect changes to US Centers for Disease Control and Prevention immunization schedules. The US Department of Health and Human Services, under Secretary ...

COVID-19 variant BA.3.2 or "cicada" is not widely circulating in the U.S. yet, but based on trends in Europe, it may become more prominent. Most evidence comes from laboratory data, but there are no ...

Amid the declining clinical severity of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and diminishing public uptake of annual coronavirus disease 2019 (Covid-19) vaccines, ...

The XFG variant of the severe acute respiratory syndrome coronavirus 2 as continued to spread as the U.S. heads into peak Summer travel season. (Photo by I RYU/VCG via Getty Images) There’s another ...