Syringes at a COVID-19 vaccination site at Kedren Community Health Center, in South Central Los Angeles, Calif., on Feb. 16, 2021. Apu Gomes/AFP via Getty Images
The Omicron variant of SARS-CoV-2 is much more effective at infecting people vaccinated against the COVID-19 disease it causes, a review of research on the subject suggests.
Research also indicates vaccination provides less protection against serious disease upon Omicron infection.
