Comparative study on epidemiological characteristics and public health interventions of COVID-19 among China, South Korea, the United States and France based on the poisson regression model

Objective To analyze the trend of COVID-19 epidemic and to comparatively evaluate effects of economic policies, containment and closure policies and health system policies in China , South Korea, the United States (US) and France. Methods Daily confirmed COVID-19 cases and daily comprehensive policy index, specific indicators in mainland China, South Korea, US and France were collected. Considering the lag effect of policy effects, poisson regression model was established to estimate the daily real-time regeneration (Rt) , and the log-log model with variable coefficient was used to compare the prevention and control effects of policies and measures in different countries. Results Containment and closure policies and health system policies were negatively correlated with Rt, and the cumulative lag effect weakens with the increase of lag time. Economic policies were negatively correlated with Rt only in US and France. The effect of American and French policies on Rt was weaker than that of China and South Korea. Conclusion Containment and closure policies and health system policies have a great effect on reducing Rt and controlling the epidemic, the timely and powerful comprehensive blockade measures at the early stage of the epidemic have better effects than mitigation measures. © 2023, Publication Centre of Anhui Medical University. All rights reserved.

Comparative study on epidemiological characteristics and public health interventions of COVID-19 among China, South Korea, the United States and France based on the poisson regression model.

Objective To analyze the trend of COVID-19 epidemic and to comparatively evaluate effects of economic policies, containment and closure policies and health system policies in China , South Korea, the United States (US) and France. Methods Daily confirmed COVID-19 cases and daily comprehensive policy index, specific indicators in mainland China, South Korea, US and France were collected. Considering the lag effect of policy effects, poisson regression model was established to estimate the daily real-time regeneration (Rt) , and the log-log model with variable coefficient was used to compare the prevention and control effects of policies and measures in different countries. Results Containment and closure policies and health system policies were negatively correlated with Rt, and the cumulative lag effect weakens with the increase of lag time. Economic policies were negatively correlated with Rt only in US and France. The effect of American and French policies on Rt was weaker than that of China and South Korea. Conclusion Containment and closure policies and health system policies have a great effect on reducing Rt and controlling the epidemic, the timely and powerful comprehensive blockade measures at the early stage of the epidemic have better effects than mitigation measures.Copyright © 2023, Publication Centre of Anhui Medical University. All rights reserved.

Bibliometric and visualized review of smart tourism research

Using bibliometric analysis, this research provides a comprehensive, systematic, and visual overview of 441 studies related to smart tourism, which were published between 2010 and 2021, thus considering the state of research and trends in this research field from the beginning of smart tourism research to the entry of the fifth-generation mobile communication technology era and the explosion of COVID-19. It also offers insights into its future research agenda and advancing the development of smart tourism. This paper can provide intuitive and valuable information to promote theoretical and practical research on smart tourism.

Inferring the Trend of COVID-19 Epidemic with Close Contacts Counting

Close contacts with high-risk exposure to COVID-19 cases are more robust in statistics for inferring future development of COVID-19 epidemic. In Beijing, the proportion of close contact cases in newly confirmed cases had increased from about 50% at the end of January to nearly 100% in mid-February, indicating that contact tracing and quarantine measures are effective non-pharmaceutical interventions for containing the epidemic. In addition, we show at the national level that the cumulative number of close contacts was stabilized at about eight times as much as infected individuals, and the growth rate of daily close contacts was consistent with that of daily confirmed cases 5~6 days later. Consequently, tracking the daily change of close contacts is beneficial to predict the trend of the epidemic, based on which advanced medical supplies scheduling and effective epidemic prevention can be achieved. © 2020, Editorial Board of Journal of the University of Electronic Science and Technology of China. All right reserved.