Maruki T, Iwamoto N, Kanda K, Okumura N, et al. Two cases of breakthrough SARS-CoV-2 infections caused by the Omicron variant (B.1.1.529 lineage) in international travelers to Japan. Clin Infect Dis 2022 Jan 3. pii: 6494531. doi: 10.1093/cid/ciab1072.
PMID: 34979547