Reduction of the risk of severe COVID-19 due to Omicron compared to Delta variant in Italy (November 2021 - February 2022).
Petrone D, Mateo-Urdiales A, Sacco C, Riccardo F, Bella A, Ambrosio L, Lo Presti A, Di Martino A, Ceccarelli E, Del Manso M, Fabiani M, Stefanelli P, Pezzotti P, Palamara A; Italian Integrated Surveillance of COVID-19.
Petrone D, et al.
Int J Infect Dis. 2023 Apr;129:135-141. doi: 10.1016/j.ijid.2023.01.027. Epub 2023 Jan 26.
Int J Infect Dis. 2023.
PMID: 36708869
Free PMC article.