Safe traveling in public transport amid COVID-19

Several intense policies, such as mandatorily wearing masks and practicing social distancing, have been implemented in South Korea to prevent the spread of the novel coronavirus disease (COVID-19). In this study, we analyzed and measured the impact of the aforementioned policies by calculating the degree of infection exposure in public transportation. Specifically, we simulated how passengers encounter and infect each other during their journeys in public transportation by tracking movements of passengers. The probabilities of exposure to infections in public transportation were compared via a combination of the aforementioned policies by using the SEIR model, a respiratory infectious disease diffusion model. We determined that the mandatorily wearing of masks exhibits similar effects to maintaining social distancing 2 m in preventing COVID-19. During peak hours, in the cases of mandatorily wearing and practicing social distancing with masks, the reduction in infection rates corresponde...为遏制新型冠状病毒病（COVID-19）的传播，韩国已推行多项严格防疫政策，涵盖强制佩戴口罩与保持社交距离。本研究通过计算公共交通场景下的感染暴露程度，分析并量化了上述政策的防控效果。具体而言，本研究通过追踪乘客的移动轨迹，模拟了公共交通行程中乘客间的接触与交叉感染过程。本研究采用SEIR模型——一种呼吸道传染病传播模型，针对不同防疫政策组合场景，对比了公共交通场景下的感染暴露概率。研究结果表明，强制佩戴口罩与保持2米社交距离在防控COVID-19方面效果相当。高峰时段下，若同时推行强制佩戴口罩与保持社交距离政策，感染率降幅对应……