1.
Williams H, Hutchinson D, Stone H. Watching Brief: The evolution and impact of COVID-19 variants B.1.1.7, B.1.351, P.1 and B.1.617. Global Biosecurity [Internet]. 2021 May 20 [cited 2025 Nov. 29];3(1). Available from: https://jglobalbiosecurity.com/index.php/up-j-gb/article/view/112