Manal Mohammed is a senior lecturer of medical microbiology at the University of Westminster. Since the COVID variant Omicron emerged in late 2021, it has rapidly evolved into multiple subvariants.

The immune system’s first encounter with a virus or vaccine establishes a “starting template” that shapes its response to new ...

(NEXSTAR) – Booster shots targeting the most common strains of the COVID-19 omicron variant are arriving at pharmacies across the country this week. The new round of booster shots marks the first time ...

The omicron subvariant that became dominant in the U.S. several weeks ago continued to extend its lead over other variants in the latest week, according to Centers for Disease Control and Prevention ...

As evidence mounts that the omicron variant is less deadly than prior COVID-19 strains, one oft-cited explanation is that viruses always evolve to become less virulent over time. The problem, experts ...

The fast-spreading BA.5 subvariant of Omicron and its close relative BA.4 now make up around 95% of COVID-19 cases in the U.S., according to estimates published Tuesday by the Centers for Disease ...

NEW YORK (WABC) -- As the highly transmissible omicron and delta coronavirus variants continue to sweep across the United States, health officials warn that more people are expected to get infected -- ...

Minnesota’s ongoing surge in coronavirus cases isn’t going anywhere, but it also doesn’t appear to be getting worse — at least not yet. The omicron variant of SARS-CoV-2, the coronavirus that causes ...

In a study published in JAMA Network Open today, scientists report on how effective the original vaccine and booster shots are against the COVID-19 Delta and Omicron variants. Researchers in Ontario ...

A new omicron variant is quickly spreading across the U.S. just in time for the New Year. The strain, known as XBB.1.5, accounts right now for almost 41% of confirmed COVID-19 cases nationwide, ...

Like a Hollywood franchise that churns out sequel after mind-numbing sequel, Omicron is back. Mere weeks after the variant’s BA.2 lineage caused surges globally, two more Omicron spin-offs are on the ...