Waning Immunity after the BNT162b2 Vaccine in Israel.
Yair GoldbergMicha MandelYinon M Bar-OnOmri BodenheimerLaurence FreedmanEric J HaasRon MiloSharon Alroy-PreisNachman AshAmit HuppertPublished in: The New England journal of medicine (2021)
These findings indicate that immunity against the delta variant of SARS-CoV-2 waned in all age groups a few months after receipt of the second dose of vaccine.