Nature
Volume 602 Issue 7898, 24 February 2022
https://www.nature.com/nature/volumes/602/issues/7898

Article | 31 December 2021
Activity of convalescent and vaccine serum against SARS-CoV-2 Omicron
Sera from unvaccinated, vaccinated, and previously infected and vaccinated individuals show reduced neutralizing and spike protein-binding activity towards the Omicron (B.1.1.529) variant of SARS-CoV-2 compared to other variants.
Juan Manuel Carreño, Hala Alshammary, Florian Krammer