
Real-World Effectiveness of Nirmatrelvir/Ritonavir in Hospitalized Older Adults with Severe Omicron COVID-19: A ...
Background Corona Virus Disease 2019 (COVID-19) is a global pandemic respiratory infectious disease. Since October 2022, the transmission advantage of sublineages such as BF.7, BQ.1, and BQ.1.1, which have stronger immune escape ability and higher …