This week, the FDA and CDC authorized Pfizer and Moderna to start administering vaccine boosters that have been reengineered to specifically target the Omicron BA.4 and BA.5 variants that caused this ...

Researchers published in the British Medical Journal (BMJ) have found infection or vaccination with the omicron variant of COVID-19 do little or nothing to protect against future infections. According ...

BUFFALO, N.Y. – A new University at Buffalo study conducted at John R. Oishei Children’s Hospital is one of the first to reveal that there were fewer cases of multi-system inflammatory syndrome in ...

The omicron variant of Covid-19 appears less likely than delta to lead to long Covid, according to British researchers. But because omicron is much more contagious than previous variants, the enormous ...

The omicron variant of the coronavirus has been dominant in the U.S. since December, but the version of omicron that drove the major infection surge during the winter now accounts for less than 2 ...