Omicron is spreading quickly. What to expect in the New Year.
Verywell Health, December 21, 2021
Just this week, Omicron became the dominant COVID-19 variant in the U.S. It's now responsible for 73.2% of U.S. COVID-19 cases—a steep climb from the late November levels at 0.1%, according to the Centers for Disease Control and Prevention (CDC). “It’s already going very fast. Previously, almost 100% used to be Delta. That's why we need to closely monitor the increase of the Omicron in the population here,” Dr. Pei-Yong Shi, chair in innovations in molecular biology at the University of Texas Medical Branch, told Verywell.