Table 2. Types of vaccines for SARS-CoV2 of the vaccinated population in South Korea on January 2022

	First dose	Second dose	Booster dose
Total, number (%)	6,730,516 (100%)	2,664,561 (100%)	6,024,358
ChAdOx1-S (AstraZeneca)	1,318,854 (19.60%)	129,984 (4.88%)	NA
BNT162b2 (Pfizer)	3,595,186 (53.42%)	1,856,650 (69.68)	3,162,978 (52.50%)
mRNA-1273 (Moderna)	1,518,135 (22.56%)	677,927 (25.44)	2,860,141 (47.48%)
Ad26.COV2.S (Janssen)	298,341 (4.43%)	NA	1,239 (4.95%)

NA, not applicable; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.