Ong SWX, Chiew CJ, Ang LW, Mak TM, et al. Clinical and virological features of SARS-CoV-2 variants of concern: a retrospective cohort study comparing B.1.1.7 (Alpha), B.1.315 (Beta), and B.1.617.2 (Delta). Clin Infect Dis 2021 Aug 23. pii: 6356459. doi: 10.1093.
PMID: 34423834