Created at	Source	Raw Value	Validated value
June 3, 2022, 10 a.m.	eu	• Rate of 2-fold antibody titre increase 14 days after the 4th vaccination dose measured by quantitative enzyme-linked immunosorbent assay (Anti-RBD-ELISA) against wild-type virus.	• Rate of 2-fold antibody titre increase 14 days after the 4th vaccination dose measured by quantitative enzyme-linked immunosorbent assay (Anti-RBD-ELISA) against wild-type virus.