Eurosurv. Age-specific SARS-CoV-2 infection fatality ratio and associated risk factors, Italy, February to April 2020

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• Age-specific SARS-CoV-2 infection fatality ratio and associated risk factors, Italy, February to April 2020
  
  
• Piero Poletti[SUP]1[/SUP], Marcello Tirani[SUP]2,3[/SUP] , Danilo Cereda[SUP]2[/SUP] , Filippo Trentini[SUP]1[/SUP] , Giorgio Guzzetta[SUP]1[/SUP] , Valentina Marziano[SUP]1[/SUP] , Sabrina Buoro[SUP]2,4[/SUP] , Simona Riboli[SUP]5[/SUP] , Lucia Crottogini[SUP]2[/SUP] , Raffaella Piccarreta[SUP]6,7[/SUP] , Alessandra Piatti[SUP]2[/SUP] , Giacomo Grasselli[SUP]8,9[/SUP] , Alessia Melegaro[SUP]6,10[/SUP] , Maria Gramegna[SUP]2[/SUP] , Marco Ajelli[SUP]11[/SUP] , Stefano Merler[SUP]1[/SUP]

We analysed 5,484 close contacts of coronavirus disease (COVID-19) cases in Italy, all tested for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Infection fatality ratio was 0.43% (95% confidence interval (CI): 0.21–0.79) for individuals younger than 70 years and 10.5% (95% CI: 8.0–13.6) for older individuals. Risk of death after infection was 62% lower (95% CI: 31–80) in clusters identified after 16 March 2020 and 1.8-fold higher for males (95% CI: 1.03–3.16).

https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2020.25.31.2001383#html_fulltext