Effectiveness of BNT162b2 BA.4/5 bivalent mRNA vaccine against a range of COVID-19 outcomes in a large health system in the USA: a test-negative case–control study

https://www.thelancet.com/journals/lanres/article/PIIS2213-2600(23)00306-5/fulltext?dgcid=hubspot_email_covidalerts&utm_campaign=lancetcovid22&utm_medium=email&_hsmi=283901121&_hsenc=p2ANqtz-8AkRexBrRIFBwnuZhP09lmYYHsQvNAdUBqW25V56pb9fINj0HQgh7S6jHfSXEh7Cx6rIwsfLxGjHWU6tmfFZQPJe_SZg&utm_content=283899141&utm_source=hs_email