The U.S. Food and Drug Administration has advised vaccine makers to update COVID booster shots to target new forms of the Omicron variant. In calling for the change, the FDA heeded the ...

Two new Omicron subvariants—BA.4 and BA.5, first identified in South Africa between January and February—are gaining steam in the United States, according to the latest estimates by the ...

It did list three variants of interest that were circulating. All are branches of the Omicron strain, which first appeared in Africa in November 2021. It quickly became the dominant strain of the ...

Rapid tests work well on Omicron variants, but only if your viral load is high at the time. You need to reach a certain threshold before any test — PCR or rapid — can detect your infection.

Here's what we know. BF.7, short for BA.5.2.1.7, is a sub-lineage of the omicron variant BA.5. You may like Bird flu could soon evolve to spread between humans. Here's how to slow its progress.

People infected with COVID-19 during the Omicron era face an increased risk of diabetes and related diseases, according to a study showing that long-term dangers of the virus have persisted since ...