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Objectives: This study analyzed the effects of COVID-19 non-pharmaceutical measures between China and South Korea to share experiences with other countries in the struggle against SARS-CoV-2. Methods: We used the generalized linear model to examine the associations between non-pharmaceutical measures adopted by China and South Korea and the number of confirmed cases. Policy disparities were also discussed between these two countries. Results: The results show that the following factors influence the number of confirmed cases in China: lockdown of Wuhan city (LWC); establishment of a Leading Group by the Central Government; raising the public health emergency response to the highest level in all localities; classifying management of "four categories of personnel"; makeshift hospitals in operation (MHIO); pairing assistance (PA); launching massive community screening (LMCS). In South Korea, these following factors were the key influencing factors of the cumulative confirmed cases: raising the public alert level to orange (three out of four levels); raising the public alert to the highest level; launching drive-through screening centers (LDSC); screening all members of Shincheonji religious group; launching Community Treatment Center (LCTC); distributing public face masks nationwide and quarantining all travelers from overseas countries for 14 days. Conclusion: Based on the analysis of the generalized linear model, we found that a series of non-pharmaceutical measures were associated with contain of the COVID-19 outbreak in China and South Korea. The following measures were crucial for both of them to fight against the COVID-19 epidemic: a strong national response system, expanding diagnostic tests, establishing makeshift hospitals, and quarantine or lockdown affected areas.

OBJECTIVE: The study analyzed the common points and discrepancies of COVID-19 control measures of the two countries in order to provide appropriate coping experiences for countries all over the world. METHOD: This study examined the associations between the epidemic prevention and control policies adopted in the first 70 days after the outbreak and the number of confirmed cases in China and Singapore using the generalized linear model. Policy comparisons and disparities between the two countries were also discussed. RESULTS: The regression models show that factors influencing the cumulative number of confirmed cases in China: Locking down epicenter; activating Level One public health emergency response in all localities; the central government set up a leading group; classified management of "four categories of personnel"; launching makeshift hospitals; digital management for a matrix of urban communities; counterpart assistance. The following four factors were the key influencing factors of the cumulative confirmed cases in Singapore: The National Centre for Infectious Diseases screening center opens; border control measures; surveillance measures; Public Health Preparedness Clinics launched. CONCLUSIONS: Through analyzing the key epidemic prevention and control policies of the two countries, we found that the following factors are critical to combat COVID-19: active case detection, early detection of patients, timely isolation, and treatment, and increasing of medical capabilities. Countries should choose appropriate response strategies with health equity in mind to ultimately control effectively the spread of COVID-19 worldwide.

PURPOSE: This study compared the government policies and non-pharmaceutical interventions adopted by South Korea, Japan, India, and China in response to COVID-19 during 2020–2021 and assessed their effectiveness. We hope that our research will help control the COVID-19 waves and a future crisis of this nature. METHODS: COVID-19 case data were obtained from Our World in Data database. Combined with case data, we made a retrospective study by analyzing the government policies and non-pharmaceutical interventions taken during this pandemic in these four representative Asian countries (South Korea, Japan, India, and China). RESULTS: From January 2020 to May 18, 2021, South Korea and Japan experienced three waves of COVID-19 outbreaks, but the number of daily new confirmed cases per million people was relatively small in both countries, and South Korea had fewer daily new confirmed cases per million than Japan. Following the COVID-19 outbreak in Wuhan in late 2019, China successfully contained the first wave of the outbreak and was not currently experiencing a large-scale resurgence of the epidemic (Until May 18, 2021). India is experiencing a grim second wave of the epidemic, with far more daily new confirmed cases per million people than South Korea and Japan. CONCLUSION: Successful practices in China and South Korea show that case identification and management, coupled with close contact tracing and isolation, is a powerful strategy. The lessons of Japan and India show that social distancing is an effective measure, but only if it is rigor and persistent. Finally, in both developed and developing countries, the development of health care systems and coordinated government leadership play a key role in overcoming epidemics.

xiaohan Wang,1 Leiyu Shi,2 Yuyao Zhang,1 Haiqian Chen,1 Jun Jiao,1 manfei yang,1 Gang Sun1,2 1Department of Health Management, School of Health Management, Southern Medical University, Guangzhou, Guangdong, 510515, People's Republic of China; 2Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, 21205, USACorrespondence: Gang SunDepartment of Health Management, School of Health Management, Southern Medical University, Guangzhou, Guangdong, 510515, People's Republic of ChinaTel +86 14103189758Email gsun15@jhu.edu; sunhoney163@163.comPurpose: This study compared the government policies and non-pharmaceutical interventions adopted by South Korea, Japan, India, and China in response to COVID-19 during 2020– 2021 and assessed their effectiveness. We hope that our research will help control the COVID-19 waves and a future crisis of this nature.Methods: COVID-19 case data were obtained from Our World in Data database. Combined with case data, we made a retrospective study by analyzing the government policies and non-pharmaceutical interventions taken during this pandemic in these four representative Asian countries (South Korea, Japan, India, and China).Results: From January 2020 to May 18, 2021, South Korea and Japan experienced three waves of COVID-19 outbreaks, but the number of daily new confirmed cases per million people was relatively small in both countries, and South Korea had fewer daily new confirmed cases per million than Japan. Following the COVID-19 outbreak in Wuhan in late 2019, China successfully contained the first wave of the outbreak and was not currently experiencing a large-scale resurgence of the epidemic (Until May 18, 2021). India is experiencing a grim second wave of the epidemic, with far more daily new confirmed cases per million people than South Korea and Japan.Conclusion: Successful practices in China and South Korea show that case identification and management, coupled with close contact tracing and isolation, is a powerful strategy. The lessons of Japan and India show that social distancing is an effective measure, but only if it is rigor and persistent. Finally, in both developed and developing countries, the development of health care systems and coordinated government leadership play a key role in overcoming epidemics.Keywords: COVID-19, pandemic, non-pharmaceutical interventions, healthcare system, public health