Effectiveness of mRNA vaccines and waning of protection against SARS-CoV-2 infection and severe covid-19 during predominant circulation of the delta variant in Italy: retrospective cohort study.
Fabiani M, Puopolo M, Morciano C, Spuri M, Spila Alegiani S, Filia A, D'Ancona F, Del Manso M, Riccardo F, Tallon M, Proietti V, Sacco C, Massari M, Da Cas R, Mateo-Urdiales A, Siddu A, Battilomo S, Bella A, Palamara AT, Popoli P, Brusaferro S, Rezza G, Menniti Ippolito F, Pezzotti P; Italian Integrated Surveillance of covid-19 study group and Italian covid-19 Vaccines Registry group.
Fabiani M, et al.
BMJ. 2022 Feb 10;376:e069052. doi: 10.1136/bmj-2021-069052.
BMJ. 2022.
PMID: 35144968
Free PMC article.