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

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.

This is especially pertinent as a new Covid variant known as NB.1.8.1 (or Nimbus) is reportedly spreading across the UK. UK ...

The new variant of Covid, NB.1.8.1, which has lost its potential to cause severe infection, since May 2023 is considered a ...

While COVID-19 transmission remains low in the US, health experts are anxious about the potential for a big summer wave as ...