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COVID vaccines less effective on Omicron, warns Moderna boss
Will omicron – the new coronavirus variant of concern – be more contagious than delta? A virus evolution expert explains what researchers know and what they don’t
By Suresh V. Kuchipudi
Markets fall on Omicron fears as officials offer vaccine reassurance
By Ludwig Burger & Emma Thomasson
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Wealthy nations starved the developing world of vaccines. Omicron shows the cost of this greed
By Deborah Gleeson
Omicron: What We Know About the Dominant Coronavirus Variant
By Andrew Jacobs, Emily Anthes & Carl Zimmer
WHO urges ‘rational’ measures against Omicron variant: Live news
By Usaid Siddiqui & Ted Regencia
Who’s in? Who’s out? The ethics of COVID-19 travel rules
By Nancy S. Jecker & Caesar A. Atuire
Netherlands says omicron variant was within its borders a week before South African flights prompted panic
By Perry Stein
Existing vaccines might not be as effective against omicron variant, Moderna CEO says
By Timothy Bella & Adela Suliman
Omicron variant was detected in the Netherlands before S. Africa flights
By Bart H. Meijer, Louise Heavens & Anthony Deutsch