Two mRNA coronavirus disease 2019 (COVID-19) vaccines, Moderna and Pfizer-BioNTech, require 2 doses for maximum efficacy. This case series reports the safety and immunogenicity of a graded administration of the second dose of the Moderna and Pfizer-BioNTech COVID-19 vaccines in patients with immediate hypersensitivity reactions to the first dose.
Keywords: 19; 2 spike protein; COVID; CoV; SARS; graded administration; mRNA vaccine.
© The Author(s) 2021. Published by Oxford University Press on behalf of Infectious Diseases Society of America.