The Lancet
Dec 11, 2021 Volume 398 Number 10317 p2125-2206, e18
https://www.thelancet.com/journals/lancet/issue/current

Comment
Omicron SARS-CoV-2 variant: a new chapter in the COVID-19 pandemic
Salim S Abdool Karim, Quarraisha Abdool Karim