Arashiro T, Arima Y, Muraoka H, Sato A, et al. COVID-19 vaccine effectiveness against symptomatic SARS-CoV-2 infection during
Delta-dominant and Omicron-dominant periods in Japan: a multi-center prospective
case-control study (FASCINATE study). Clin Infect Dis 2022 Aug 3. pii: 6653543. doi: 10.1093.
PMID: 35918782