Sudden rise in COVID-19 case fatality among young and middle-aged adults in the south of Brazil after identification of the novel B.1.1.28.1 (P.1) SARS-CoV-2 coronavirus strain

Individuals between 20 and 29 years of age whose diagnosis was made in February 2021 had an over 3-fold higher risk of death compared to those diagnosed in January 2021, while those aged 30-39, 40-49, 50-59 years experienced 93%, 110%, and 80% increases in risk of death, respectively.  More...