Nature
Volume 602 Issue 7896, 10 February 2022
https://www.nature.com/nature/volumes/602/issues/7896

Article | 22 December 2021 | Open Access
Enhanced fitness of SARS-CoV-2 variant of concern Alpha but not Beta
The Alpha variant of SARS-CoV-2 outcompetes progenitor SARS-CoV-2 in upper respiratory tract replication competition in vivo.
Lorenz Ulrich, Nico Joel Halwe, Charaf Benarafa