Effectiveness of bivalent mRNA vaccines against medically attended symptomatic SARS-CoV-2 infection and COVID-19-related hospital admission among SARS-CoV-2-naive and previously infected individuals: a retrospective cohort study

https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(23)00373-0/fulltext?dgcid=hubspot_email_covidalerts&utm_campaign=covidalerts&utm_medium=email&_hsmi=271757280&_hsenc=p2ANqtz-_twCLkEHuieRKMOPnKJPRbed8-4YvOXcDVpApjQpWUs_lgev8d_AzZBts0joofcTtZgACvLXbdZMByUkHb3_2Me6fQJg&utm_content=271743104&utm_source=hs_email