Risk of severe outcomes among SARS-CoV-2 Omicron BA.4 and BA.5 cases compared to BA.2 cases in England. Aziz NA, Nash SG, Zaidi A, Nyberg T, et al. J Infect 2023 Apr 24:S0163-4453(23)00249-9. doi: 10.1016/j.jinf.2023.

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Aziz NA, Nash SG, Zaidi A, Nyberg T, et al. Risk of severe outcomes among SARS-CoV-2 Omicron BA.4 and BA.5 cases compared to BA.2 cases in England. J Infect 2023 Apr 24:S0163-4453(23)00249-9. doi: 10.1016/j.jinf.2023.
PMID: 37100176