GMT ratio of humural immune response; seroconversion rate of humural immune response meameasured at baseline and 14 days after the second vaccination in a subset of participants.sured at baseline and 14 days after the second vaccination in a subset of participants. Pseudovirus neutralization assay

GMT ratio of humural immune response; seroconversion rate of humural immune response meameasured at baseline and 14 days after the second vaccination in a subset of participants.sured at baseline and 14 days after the second vaccination in a subset of participants. Pseudovirus neutralization assay