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Omicron: Pfizer-BioNTech COVID-19 vaccine may only partially protect against new variant, study suggests

Omicron in the US: Where is it this week?

Omicron variant 'almost certainly' less severe than delta, Fauci says

Allergy sufferers have nearly 40% lower risk of COVID-19 infection, study says

Omicron variant in the US: What we know

FDA panel endorses first COVID-19 pill

Merck COVID-19 pill: FDA panel weighs safety, effectiveness

No cases of COVID-19 omicron variant identified yet in US, CDC says

Fauci would 'not be surprised' if omicron is already in US, predicts it will go 'all over'

Dutch authorities check for COVID-19 omicron variant after 61 arrivals from South Africa test positive