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Omicron: What We Know About the Dominant Coronavirus Variant
By Andrew Jacobs, Emily Anthes & Carl Zimmer
Who’s in? Who’s out? The ethics of COVID-19 travel rules
By Nancy S. Jecker & Caesar A. Atuire
Existing vaccines might not be as effective against omicron variant, Moderna CEO says
By Timothy Bella & Adela Suliman
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Wealthy nations starved the developing world of vaccines. Omicron shows the cost of this greed
By Deborah Gleeson
Mask mandates to tackle Omicron come into force in England
By Alistair Smout & Paul Sandle
Omicron mutations alarm scientists, but new variant first must prove it can outcompete delta
By Joel Achenbach
Moderna boss predicts current vaccines may be less effective against Omicron covid
By Graeme Wearden, Julia Kollewe & Peter Beaumont
‘The world is watching South Africa’: health experts sift Omicron clues
By Joseph Cotterill, John Burn-Murdoch & Oliver Barnes