Binding and neutralization antibody titers after a single vaccine dose in health care workers previously infected with SARS-CoV-2
Methods Health care workers who had previously enrolled in a hospital-wide serosurvey
study, 3 conducted from July to August 2020 at the University of Maryland Medical Center,
were randomly contacted based on stratification into 3 groups: SARS-CoV-2 IgG antibody–
negative (Ab-negative); IgG-positive asymptomatic COVID-19 (asymptomatic); and IgG-
positive with history of symptomatic COVID-19 (symptomatic). Participants were vaccinated
with either the Pfizer-BioNTech or Moderna vaccine, depending on personal preference and …
study, 3 conducted from July to August 2020 at the University of Maryland Medical Center,
were randomly contacted based on stratification into 3 groups: SARS-CoV-2 IgG antibody–
negative (Ab-negative); IgG-positive asymptomatic COVID-19 (asymptomatic); and IgG-
positive with history of symptomatic COVID-19 (symptomatic). Participants were vaccinated
with either the Pfizer-BioNTech or Moderna vaccine, depending on personal preference and …