European wave of Omicron sub-variant BA.2 foreshadows US surge
By John Burn-Murdoch, Leila Abboud & Oliver Barnes
AstraZeneca COVID drug neutralises Omicron sub-variants in lab study
By Pushkala Aripaka, Aditya Soni & Kalluvila Sriraj
A Stress Test for America's New COVID Plan Is Coming
By Katherine J. Wu
What is the new COVID-19 variant BA.2, and will it cause another wave of infections in the US?
By Prakash Nagarkatti & Mitzi Nagarkatti