Friday, June 20, 2025

Catherine Smallwood

January 10, 2023

COVID-19: WHO backs mask-wearing on long flights amid U.S. spread of Omicron variant

The XBB.1.5 sub-variant, the most transmissible Omicron sub-variant, so far accounted for 27.6 per cent of COVID-19 cases in the U.S. for the week ending January 7.

A photo of passengers wearing face masks used to