Efficacy of nirmatrelvir therapy in preventing mortality and hospitalizations for COVID-19 in high-risk patients during increased Omicron
In late 2021, there was a global resurgence of coronavirus disease 2019 (COVID-19) due to the onset of the Omicron variant of the highly acute acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Omicron had surpassed the Delta variant by the end of December 2021. By early January, Omicron had spread widely around the world, even in …