Delta vs. Omicron: Which COVID-19 variant will become dominant in the US? - The Boston Globe

Two key issues will determine the fate of Omicron: how transmissible it is and how well it evades the body’s immune system.

Coronavirus: Covid News: Omicron Variant Appears to Be Spreading Fast in Washington State - The New York Times

Coronavirus: Covid News: Pfizer to Seek Approval for Boosters for 16- and 17-Year-Olds - The New York Times

COVID-19 pandemic - Wikipedia

Genomic Surveillance for SARS-CoV-2 Variants: Predominance of the Delta (B.1.617.2) and Omicron (B.1.1.529) Variants — United States, June 2021–January 2022

New omicron subvariants now dominant in the U.S., raising fears of a winter surge - OPB

U.S. steps up search for Omicron variant in domestic COVID-19 cases

Pregnancy outcomes and vaccine effectiveness during the period of omicron as the variant of concern, INTERCOVID-2022: a multinational, observational study - The Lancet

Omicron BA.2 Variant Is Dominant Covid-19 Strain in U.S., CDC Estimates - WSJ

Chart: Omicron BA.2 Variant to Become Dominant in the U.S.

Omicron becomes dominant variant in Mass., already 'straining the system' - The Boston Globe

A guide to help you keep track of all the Omicron subvariants - Los Angeles Times

New COVID variant has taken over, sparking concerns of a winter surge

New COVID variant, XBB, better at evading immunity, now dominates the Northeast

COVID cases predicted to rise in coming weeks because of new BA.2 variant - ABC News