COVID-19 cases, death, and vaccination rates in the USA, UK, Germany, France, Italy, and South Korea. (a) COVID-19 confirmed cases; (b) Death rates; (c) vaccination rates (≥ 1) in South Korea and worldwide, with death rates. The blue arrowed text boxes show the timeline in South Korea during the COVID-19 pandemic. The red arrowed text boxes show the timeline of representative events outside South Korea at the same time. Data were retrieved from https://coronavirus.jhu.edu/map.html and https://ourworldindata.org/covid-vaccinations on May 10, 2022. Detailed information on the preventive measures adopted in South Korea is available at http://ncov.mohw.go.kr/en.