Determining the duration of immunity to SARS-CoV-2 vaccines is critical for informing the timing of booster immunization. Many host factors could influence both the magnitude and persistence of the antibody response. Here, we showed that SARS-CoV-2 infection before vaccination and age affected the decay of antibody responses to the SARS-CoV-2 mRNA vaccine.
Determining the duration of immunity to SARS-CoV-2 vaccines is critical for informing the timing of booster immunization. Many host factors could influence both the magnitude and persistence of the antibody response. Here, we showed that SARS-CoV-2 infection before vaccination and age affected the decay of antibody responses to the SARS-CoV-2 mRNA vaccine.