Impressive Boosting of Anti-S1/S2 Immunoglobulin G Production in Coronavirus Disease 2019 (COVID-19)-experienced Patients After the First Shot of the BNT162b2 Messenger RNA COVID-19 Vaccine. (6th March 2021) - Capetti, Amedeo F; Stangalini, Carlo A; Borgonovo, Fabio; Mileto, Davide; Oreni, Letizia; Dedivitiis, Gianfranco; Lupo, Angelica; Cossu, Maria V; Bilardo, Lara; Giacomelli, Andrea; Galli, Massimo; Rizzardini, Giuliano