Kato H, Miyakawa K, Ohtake N, Yamaoka Y, et al. Vaccine-induced humoral response against SARS-CoV-2 dramatically declined but
cellular immunity possibly remained at 6 months post BNT162b2 vaccination. Vaccine 2022 Mar 29. pii: S0264-410X(22)00369.
PMID: 35370020