Increased transmissibility and global spread of SARS-CoV-2 variants of concern as at June 2021.
Euro Surveill. 2021 Jun;26(24):2100509. doi: 10.2807/1560-7917.ES.2021.26.24.2100509.
Euro Surveill. 2021.
PMID: 34142653
Free PMC article.