Add Yahoo as a preferred source to see more of our stories on Google. (NewsNation) — As the weather begins to change and respiratory illnesses become more common, a highly transmissible strain of ...

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 ...

Here’s what the Centers for Disease Control and Prevention (CDC) says about the Delta variant, its symptoms, characteristics and other things to watch for: Viruses constantly change through mutation, ...

Add Yahoo as a preferred source to see more of our stories on Google. While some liken it to the common cold, COVID-19 is still a lethal disease, and certain groups are still at a higher risk of a ...

A new COVID variant known as the "XEC variant" is raising questions and capturing the attention of researchers heading into the fall and winter season. The variant has been largely spreading overseas ...

XFG variant rose from 14% to 78% of U.S. cases between June and August 2025. Updated vaccines offer protection; older or at-risk adults advised to act early. CDC urges masks, hand hygiene and rapid ...

Such knowledge could be particularly useful when it comes to COVID-19. Granted, the symptoms of the latest Omicron variants don’t tend to be severe, but testing positive means isolating for several ...

The timing of symptom onset depends on lots of factors, including the amount of virus to which someone was exposed, Hotez says. Their level of pre-existing immunity may also affect the likelihood or ...

(NewsNation) — As the weather begins to change and respiratory illnesses become more common, a highly transmissible strain of COVID-19 is on the rise across the United States. Nineteen states are ...