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.

The World Health Organisation (WHO) is closely monitoring a fresh rise in global Covid-19 cases, driven largely by a new variant - Nimbus (NB.1.8.1). First identified in January 2025, this sub-variant ...

COVID-19 appears to be on the rise in some parts of California as a new, highly contagious subvariant—featuring "razor blade ...

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

A new SARS-CoV-2 variant, NB.1.8.1, may now account for more than one-third of all COVID-19 cases in the US, health officials say.

New research suggests a link between some weight loss drugs and potentially blinding eye diseases. That risk is especially high for older adults. A recent study found that older adults with diabetes ...

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

The new COVID-19 variant NB.1.8.1, nicknamed ‘Nimbus,’ now accounts for 37% of U.S. cases. It spreads fast, causes severe sore throat, and may evade immunity due to spike mutations.

NB.1.8.1 — a new COVID-19 variant tied to a surge in China — now accounts for around 37% of cases in the U.S., according to variant proportion estimates from the CDC. Four notes: ...