In patients with COVID-19, preexisting immunity and Omicron infection were associated with reduced disease severity and upper respiratory symptom presentation.

Variant NB.1.8.1 accounted for 0% of U.S. cases in April. By mid-June, it was estimated to be the cause of around 37% of ...

A new COVID-19 variant named "Nimbus" has been detected in the U.S. and is spreading rapidly. Here's what to know about ...

From a persistent sore throat that feels like razor blades to severe muscle aches, discover some unusual signs of the new COVID-19 variant NB.1.8.1 spreading globally.

A study led by Cedars-Sinai investigators has uncovered a significant uptick in chronic digestive disorders, like irritable ...

Reported symptoms of NB.1.8.1 are similar to other COVID-19 strains, but one distinctive complaint is a severe sore throat, ...

Patients and doctors say the latest COVID-19 variant spreading in the U.S. in some cases causes a sore throat so painful it ...

Covid-19 comeback: Here's why coronavirus is spreading again and new symptoms you should watch out for By Zarafshan Shiraz, New Delhi Jun 10, 2025 12:32 PM IST Read this news in brief form ...

COVID-19 variant is quietly making its rounds across the United States, prompting health officials to reiterate the ...

COVID-19 infections are associated with a wide range of symptoms, from fever and fatigue to coughing and congestion. But in the months after a COVID-19 infection, many patients still aren’t at their ...

The incubation period for the coronavirus is between 2 and 14 days. On average, COVID-19 symptoms appear around 5 days after exposure, but this can vary. Learn more.

A new COVID-19 variant spreading across the United States may cause an extremely painful sore throat—dubbed the "razor throat"—among its symptoms. The new "Nimbus" strain, also known as COVID ...