H Tegally, E Wilkinson, D Martin, M Moir, A Brito… - medRxiv, 2022 - medrxiv.org
In many regions of the world, the Alpha, Beta and Gamma SARS-CoV-2 Variants of Concern
(VOCs) co-circulated during 2020-21 and fueled waves of infections. During 2021, these …