Effect of vaccination on the case fatality rate for COVID-19 infections 2020-2021: multivariate modelling of data from the US Department of Veterans Affairs.

Glen H MurataAllison E MurataDouglas J PerkinsHeather M CampbellJenny T MaoBrent WagnerBenjamin H McMahonCurt H Hagedorn

Published in: BMJ open (2022)

Our CFR model controls for the severity of confounding factors and priority of vaccination, rather than solely using the presence of comorbidities. Our results confirm that Delta was more lethal than earlier variants and that vaccination is an effective means of preventing death. After adjusting for major selection biases, we found no evidence that the benefits of vaccination on CFR declined over 34 weeks. We suggest that this model can be used to evaluate vaccines designed for emerging variants.

Keyphrases

coronavirus disease
copy number
sars cov
electronic health record
big data
data analysis
gestational age