1. Effectiveness of a bivalent mRNA vaccine booster dose to prevent severe COVID-19 outcomes: a retrospective cohort study;Arbel;Lancet Infect Dis,2023
2. Effectiveness of BA.1- and BA.4/BA. 5-Containing Bivalent COVID-19 mRNA Vaccines Against Symptomatic SARS-CoV-2 Infection During the BA.5-Dominant Period in Japan;Arashiro;Open Forum Infect Dis,2023
3. Approval for emergency use of a bivalent vaccine against the Pfizer Omicron mutation (BA.4/5),2022
4. Permission to import the Pfizer bivalent vaccine against Omicron mutations (BA.1) [press release],2022
5. The Ministry of Food and Drug Safety approved a modern bivalent vaccine against Omicron mutations (BA.1),2022