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Dynamics of SARS-CoV-2 anti-spike (S) protein IgG (IgGS) antibodies after complete vaccination in previously infected and uninfected study participants. Antibody titers were evaluated monthly for 7 months. Median titers of IgGS antibodies in males (A), females (B), healthcare workers aged 24–44 years (C), and healthcare workers aged 45–66 years (D).
