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

COVID-19 variant XFG accounted for 0% of U.S. cases in May. By late-June, it became the third-most common strain.

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 ...

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 variant of the virus that causes COVID-19 is spreading in the U.S., raising concerns about a potential wave of ...

The first known meta-analysis of how SARS-CoV-2 variant type and time since infection influence long-COVID symptoms ties Omicron to brain fog and paresthesia (numbness and tingling), while earlier ...

Add Yahoo as a preferred source to see more of our stories on Google. Getty Images An alleged warning has spread online for years about a supposed "new COVID-Omicron XBB variant" — a new strain of the ...

COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers for Disease Control and Prevention. Some regions of the United States ...

Anyone with worsening symptoms should contact their doctor or Healthline. People who have a weakened immune system, high-risk ...

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 ...

Six years after COVID-19 first reached New Zealand, the country is experiencing its ninth wave of infections. But the virus we are living with today behaves very differently from the one that caused ...