Created at	Source	Raw Value	Validated value
Sept. 11, 2022, 1 a.m.	usa	To assess safety of booster vaccination of PTX-COVID19-B in Safety Cohort;To demonstrate that the immune response of a single booster dose of PTX-COVID19-B is non inferior to that of Comirnaty®	To assess safety of booster vaccination of PTX-COVID19-B in Safety Cohort;To demonstrate that the immune response of a single booster dose of PTX-COVID19-B is non inferior to that of Comirnaty®