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COVID-19 vaccine effectiveness against symptomatic SARS-CoV-2 infections, COVID-19 related hospitalizations and deaths, among individuals aged ≥65 years in Portugal: A cohort study based on data-linkage of national registries February-September 2021
Machado A,
Kislaya I,
Rodrigues AP,
Sequeira D,
Lima J,
et al.
(2022)
COVID-19 vaccine effectiveness against symptomatic SARS-CoV-2 infections, COVID-19 related hospitalizations and deaths, among individuals aged ≥65 years in Portugal: A cohort study based on data-linkage of national registries February-September 2021.
PLOS ONE 17(9): e0274008.
https://doi.org/10.1371/journal.pone.0274008