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

New COVID variant NB.1.8.1, or Nimbus, is spreading rapidly in the US, accounting for over one-third of cases.

My husband and I will be traveling to the United Kingdom in July and will be on a ship with about 700 passengers. We are wondering whether it would be smart (or unnecessary) to get a COVID booster ...

As Kenya's vaccine manufacturing dreams stall in endless MOUs, desperate parents face empty pharmacy shelves and vulnerable ...