Effectiveness of Inactivated COVID-19 Vaccination Against COVID-19–Related Hospitalization and Severe Outcomes in Adults ≥80 Years During Omicron Circulation in Beijing, China: Retrospective Cohort Study

Effectiveness of Inactivated COVID-19 Vaccination Against COVID-19–Related Hospitalization and Severe Outcomes in Adults ≥80 Years During Omicron Circulation in Beijing, China: Retrospective Cohort Study

Authors of this article:

Dan Zhao^{1, 2, 3} ;   Ying Ma^{1, 2, 3} ;   Juan Li^{1, 2, 3} ;   Xiaomei Li^{1, 2, 3} ;   Zhiqiang Cao^{1, 2, 3} ;   Wei Yao¹ ;   Jiang Wu^{1, 2} ;   Luodan Suo^{1, 2, 3}