We assessed SARS-CoV-2 anti-spike immunoglobulin G (anti-S-IgG) levels among healthcare workers (HCWs) after BNT162b2 vaccination. The anti-S-IgG titers of study participants were measured every three months. a week before. and three weeks after each vaccination. https://mabelandfoxs.shop/product-category/play-dough/