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 cases.

The defining symptom for NB.1.8.1, according to clinicians, is that severe sore throat.Doctors say the variant appears more ...

By Jack Phillips Contributing Writer While activity for COVID-19 remains low in the United States, recent statistics released ...

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 ...

A new COVID-19 strain called Stratus may evade vaccine immunity, experts warn. With rising cases in the UK and unusual ...

The Stratus COVID-19 variant, which includes the XFG and XFG.3 strains, currently accounts for around 30 per cent of COVID-19 ...

A new COVID-19 variant, unheard of just months ago, is projected to be the second-most common strain in the U.S. just in time for summer. Variant NB.1.8.1, first detected in January in China ...

XFG (Stratus) is the latest subvariant of Omicron that is gaining momentum in the summer surge of the pandemic.

A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to ...

A new strain of Covid has spread across the UK with some experts warning it is resisting immunity. Unlike other strains, the ...