Immune response after a single dose of BNT162b2 vaccine was markedly increased in subjects with previous severe acute respiratory syndrome coronavirus 2 infection, reaching similar immunoglobulin titers to those elicited by the full 2 doses in naive cases, and increased modestly after the second dose. These data may inform the priority of the boosting dose.
Keywords: COVID-19; SARS-CoV-2; health care workers; immune response; vaccine.
© The Author(s) 2021. Published by Oxford University Press on behalf of Infectious Diseases Society of America.