New immune-evading Omicron subvariant BA.5 is now dominant in the U.S.—and previous heavy hitter "stealth Omicron" is now a shadow of its former self, according to federal health data released Tuesday ...
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 ...
The Omicron variant spreads easier than other variants of coronavirus, and people can get it twice. Reinfection is possible even if a person has already had this virus or is fully vaccinated. Several ...
A pair of immune-evading Omicron subvariants are now dominant in the U.S., having overtaken so-called "stealth Omicron" and close relative BA.2.12.1 in mere weeks, according to federal health data ...
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Pfizer said the booster triggered more antibodies against omicron BQ.1.1, BA.4.6, BA.2.75.2 and XBB.1 in adults older than 55 compared with a fourth dose of the original vaccines. Pfizer developed its ...
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 ...
Pfizer announced Saturday that tweaking its COVID-19 vaccine to better target the omicron variant is safe and works — just days before regulators debate whether to offer Americans updated booster ...
In COVID terms, the middle of last autumn looked a lot like this one. After a rough summer, SARS-CoV-2 infections were down; hospitalizations and deaths were in a relative trough. Kids and workers ...
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