A new COVID-19 strain has been reported in dozens of countries, including the U.S. Here's what you should know about it.

Health authorities and clinicians across China are warning of a significant surge in COVID‑19 infections this July, driven by the NB.1.8.1 variant—a descendant of the JN.1 lineage that now dominates ...

COVID appears to be on the rise as a new, highly contagious subvariant — featuring “razor blade throat” symptoms overseas — ...

Vaccine makers will have to run large new trials before updated shots can be approved for everyone who is not at a higher-than-average risk.