How is this booster different from other COVID-19 vaccines? The new booster is what’s known as a bivalent vaccine, meaning it offers protection from more than one virus or subtype of a virus. So far ...

The University of Waterloo's wastewater monitoring shows an Omicron subvariant has been detected in Waterloo region. The BA.2 subvariant appears to be even more transmissible than the original Omicron ...

Even as COVID-19 cases and hospitalizations driven by the omicron subvariant BA.5 continue to fall in the United States, the proportion of infections attributed to other omicron offshoots is rising.

It only took about a month for BA.2.12.1, an Omicron subvariant, to cause most of the new COVID-19 cases in the U.S. since scientists first spotted it in the country. But even newer iterations of the ...

The new omicron boosters are very effective at preventing seniors from being hospitalized with Covid, according to a new CDC study. U.S. health officials have focused in particular on making sure more ...

SAN FRANCISCO (KGO) -- Over a month ago, omicron's subvariant BA.2.12.1 became the dominant strain across the country. Fast forward to this week and now the CDC confirmed BA.4 and BA.5 combined are ...

(NEXSTAR) – On Tuesday, the Centers for Disease Control and Prevention added two new subvariants to its online tracker: BA.4 and BA.5. Both are subvariants of the omicron variant of COVID-19, which ...

Omicron is mutating in giant leaps, with scientists racing to keep up. Its diversity is challenging vaccine efficacy and complicating treatment. But this fall, broad spectrum bivalent vaccines may ...

The Ba.4 and Ba.5 subvariants of omicron are now estimated to make up more than half of all COVID-19 cases in the United States. Here’s what to know. Less than six months after the omicron wave hit ...

XBB.1.5 made up 27.6% of sequenced Covid cases nationally for the week ending Jan. 7 compared to 18.3% for the week end Dec. 31. The World Health Organization has described XBB.1.5 as the most ...

The Omicron-specific COVID-19 booster may be available in a few weeks, assuming federal agencies sign off on the new shot, a top White House COVID-19 official said this week. The booster has been ...

It’s one of the perplexing mysteries of the Covid pandemic: Where did Omicron emerge from, almost one year ago? The fast-moving, extremely contagious variant arrived just after Thanksgiving 2021, ...