As summer comes to an end, COVID-19 cases are on the rise again in California. While respiratory viruses usually peak in the winter, the novel coronavirus can also surge in the warmer months.

Doctors across multiple countries are flagging a painful new COVID-19 symptom tied to a fast-spreading variant: a sore throat so severe that patients compare it to swallowing razor blades. The symptom ...

As the weather cools and fall approaches, COVID-19 cases are still spiking in much of the United States. The country has yet to emerge from a late summer COVID wave driven by the highly contagious new ...

Add Yahoo as a preferred source to see more of our stories on Google. COVID-19 cases continue to climb week-over-week as summer draws to a close, according to U.S. health data. Some regions of the ...

COVID-19 cases were relatively low across the country for most of the summer, but they’re now creeping up again. Data shows that this is thanks to the new COVID-19 variant XFG, nicknamed Stratus, ...

"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...

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 ...

AI-generated summary reviewed by our newsroom. Read our AI Policy. XFG variant rose from 14% to 78% of U.S. cases between June and August 2025. Updated vaccines offer protection; older or at-risk ...