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

Massimo Fabiani,Fortunato D’Ancona,Francesca Ippolito ,Marco Tallon,Matteo Spuri,Cristina Morciano,Silvio Brusaferro,Valeria Proietti,Alberto Mateo Urdiales ,Anna Teresa Palamara,Stefania Spila Alegiani,Martina Del Manso,Chiara Sacco,Marco Massari,Patrizio Pezzotti,Flavia Riccardo,Antonietta Filia,Andrea Siddu,Giovanni Rezza,Antonino Bella,Maria Puopolo,Patrizia Popoli,Roberto Da ,Serena Battilomo,Null Author_Id

doi:10.1136/bmj-2021-069052

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

Massimo Fabiani, Fortunato D’Ancona + Show 23 more

Open Access

https://doi.org/10.1136/bmj-2021-069052

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Journal: BMJ (Clinical research ed.)	Publication Date: Feb 10, 2022
Citations: 76	License type: open-access

Affiliation: Istituto Superiore di Sanità, Ministero della Salute

#Severe Covid-19 #Incidence Rate Ratio + Show 8 more

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Abstract

ObjectivesTo estimate the effectiveness of mRNA vaccines against SARS-CoV-2 infection and severe covid-19 at different time after vaccination.DesignRetrospective cohort study.SettingItaly, 27 December 2020 to 7 November 2021.Participants33 250 344 people...

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