Reduction of the risk of severe COVID-19 due to Omicron compared to Delta variant in Italy (November 2021 - February 2022).

Daniele Petrone,Alberto Mateo-Urdiales,Chiara Sacco,Flavia Riccardo,Antonino Bella,Luigina Ambrosio,Alessandra Lo Presti,Angela Di Martino,Emiliano Ceccarelli,Martina Del Manso,Massimo Fabiani,Paola Stefanelli,Patrizio Pezzotti,AnnaTeresa Palamara

International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases（2023）

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摘要

The Omicron variant is associated with a lower risk of severe COVID-19 compared to infection with the Delta variant, but the degree of protection varies with age.

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关键词

COVID-19,Delta variant,Omicron variant,SARS-CoV-2,death,hospitalisation

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