Antibody Responses in Seropositive Persons after a Single Dose of SARS-CoV-2 mRNA Vaccine | NEJM
▻https://www.nejm.org/doi/full/10.1056/NEJMc2101667
#Vaccination chez les #SARS-CoV-2 séropositifs.
The antibody titers of vaccinees with preexisting immunity were 10 to 45 times as high as those of vaccinees without preexisting immunity at the same time points after the first vaccine dose (e.g., 25 times as high at 13 to 16 days) and also exceeded the median antibody titers measured in participants without preexisting immunity after the second vaccine dose by more than a factor of 6. Although the antibody titers of the vaccinees without preexisting immunity increased by a factor of 3 after the second vaccine dose, no increase in antibody titers was observed in the Covid-19 survivors who received the second vaccine dose.