SARS-CoV-2 Omicron Variant Neutralization in Serum from Vaccinated and Convalescent Persons

Abstract

During the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, several new viral variants have emerged, leading to the virus becoming more contagious. However, efficient immune escape has not been observed, and vaccines have remained effective. Most recently, the B.1.1.529 (omicron) variant has been described, which the World Health Organization classified as a variant of concern on November 26, 2021.¹