Antibody Responses after a Single Dose of SARS-CoV-2 mRNA Vaccine

Study of Pfizer vaccine (n=188) found, that 3 weeks after vaccination, those who had a SARS-CoV-2 infection in the previous 30-60 days, or seropositive status, had significantly higher levels of antibody to four SARS-CoV-2 antigens than did those without a history of infection.

New England Journal of Medicine