Background Pregnant and lactating women were excluded from initial coronavirus disease
2019 vaccine trials; thus, data to guide vaccine decision making are lacking. Objective This
study aimed to evaluate the immunogenicity and reactogenicity of coronavirus disease 2019
messenger RNA vaccination in pregnant and lactating women compared with:(1)
nonpregnant controls and (2) natural coronavirus disease 2019 infection in pregnancy.
Study Design A total of 131 reproductive-age vaccine recipients (84 pregnant, 31 lactating …