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 ...

The new omicron variant took only a few weeks to live up to dire predictions about how hugely contagious it is. But scientists don't yet know if it causes more severe disease even as the world faces ...

SAN FRANCISCO -- There's a new "subvariant" of the omicron variant that's been spreading across Europe and the U.S. Preliminary data shows it's more contagious than omicron. Scientist have named it BA ...

COVID-19 cases and deaths have been falling across the U.S. for several weeks as the omicron wave recedes. But the Centers for Disease Control and Prevention says a new subvariant of omicron is ...

Moderna’s Omicron-adapted COVID-19 vaccines appear to reduce the risk of hospitalization and death in adults who are not pregnant or have a weakened immune system, according to a rapid review ...

Pfizer and BioNTech said Wednesday that initial lab tests show that the omicron variant partly escapes protection offered by the companies' two-dose regimen of their COVID-19 vaccine. However, those ...

Ukraine has confirmed cases of two new dominant coronavirus subvariants in the world - Nimbus and Stratus. They spread faster than their predecessors and pose a risk to people with weakened immune ...