Pratò S, Paladino ME, Riva MA, et al. Anti-SARS-CoV-2 IgG antibodies induced by the BNT162b2 mRNA vaccine is age-dependent and influenced by a previous natural SARS-CoV-2 infection. Acta Biomed. 2022;92(6):e2021464. doi:10.23750/abm.v92i6.12286