Vaccine Effectiveness Against Severe Disease and Death for Patients With COVID-19 During the Delta-Dominant and Omicron-Emerging Periods: A K-COVE Study

• DOI: 10.3346/jkms.2023.38.e87
• Publication Date: 2023-03-08T23:44:07Z
• Authors: Yoo-Yeon Kim; Young June Choe; Jia Kim; Ryu Kyung Kim; Eun Jung Jang; Hyeryeon Lee; Seonju Yi; Sangwon Lee; Young-Joon Park
• Keywords: COVID-19 Vaccines; Patients; Odds Ratio; Humans; COVID-19; Vaccine Efficacy; Brief Communication; 3. Good health

National cohort data collected during the coronavirus disease 2019 (COVID-19) delta and omicron periods in Korea revealed a lower risk of severe infection in recipients of three doses of the COVID-19 vaccine (adjusted odds ratio [aOR], 0.05-0.08). The risk of death was reduced during the omicron period compared to the delta period (aOR, 0.75; 95% confidence interval, 0.67-0.84).