Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

Stratus and Nimbus have similar symptoms to previous variants including a fever, cough and runny nose, but the Nimbus variant ...

RIO VISTA, Calif. — People living in the Isleton and Rio Vista areas of the Sacramento–San Joaquin Delta say they’ve spent ...

At 12 months, risk factors for persistence of long COVID symptoms included male sex, fever, and taste disorder.

LONDON (Reuters) – A subvariant of Delta that is growing in Britain is less likely to lead to symptomatic COVID-19 infection, a coronavirus prevalence survey found, adding that overall cases had ...