XFG, dubbed “American COVID,” is spreading globally, with reports linking the variant to a distinctive hoarse or croaky voice ...

Sometimes referred to as ‘Stratus’ or the ‘American strain’, the variant first identified in January 2025 has since spread ...

The fast-spreading delta variant of the coronavirus has been gaining traction worldwide since it was first detected in India. It’s a version of the coronavirus that has been found in more than 80 ...

With the CDC estimating that the delta variant accounts for more than 90% of new COVID cases in the U.S., scientists are still learning more about what makes this variant different from prior versions ...

Add Yahoo as a preferred source to see more of our stories on Google. A person purchases medicine at a Walgreen pharmacy counter. San Francisco Bay Area officials say COVID activity remains low, even ...