New virus strain spikes in 9 US states with symptoms from brain fog to persistent cough

The XFG variant, also known as Stratus, is now the predominant COVID-19 strain in the U.S. after spreading to 38 countries, ...
USA Today

A new COVID variant is spreading in the US: What are the symptoms?

A new COVID-19 variant that was unheard of just months ago is now projected to be the second-most common strain in the United States. Variant NB.1.8.1 was first detected in China in January but ...