Vaccine effectiveness against infection with the Delta (B.1.617.2) variant, Norway, April to August 2021.
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Seppälä E, Veneti L, Starrfelt J, Danielsen AS, Bragstad K, Hungnes O, Taxt AM, Watle SV, Meijerink H
Euro Surveill 26 (35) - [2021-09-00; online 2021-09-04]
Some variants of SARS-CoV-2 are associated with increased transmissibility, increased disease severity or decreased vaccine effectiveness (VE). In this population-based cohort study (n = 4,204,859), the Delta variant was identified in 5,430 (0.13%) individuals, of whom 84 were admitted to hospital. VE against laboratory confirmed infection with the Delta variant was 22.4% among partly vaccinated (95% confidence interval (CI): 17.0-27.4) and 64.6% (95% CI: 60.6-68.2) among fully vaccinated individuals, compared with 54.5% (95% CI: 50.4-58.3) and 84.4% (95%CI: 81.8-86.5) against the Alpha variant.
Category: Genomics & transcriptomics
PubMed 34477054
DOI 10.2807/1560-7917.ES.2021.26.35.2100793
Crossref 10.2807/1560-7917.ES.2021.26.35.2100793