High vaccine effectiveness against severe COVID-19 in the elderly in Finland before and after the emergence of Omicron.

Ulrike BaumEero PoukkaTuija LeinoTerhi KilpiHanna NohynekArto A Palmu

Published in: BMC infectious diseases (2022)

VE against severe COVID-19 is high among the elderly. It waned slightly after two doses, but a third restored the protection. VE against severe COVID-19 remained high even after the emergence of Omicron.

Keyphrases

coronavirus disease
sars cov
early onset
randomized controlled trial
middle aged
systematic review
community dwelling