key: cord-0987447-4ii839ih authors: Idogawa, Masashi; Tange, Shoichiro; Nakase, Hiroshi; Tokino, Takashi title: Interactive web-based graphs of novel coronavirus COVID-19 cases and deaths per population by country date: 2020-04-27 journal: Clin Infect Dis DOI: 10.1093/cid/ciaa500 sha: 7d2debc1ecab043ca44ace419feaefecca1d974c doc_id: 987447 cord_uid: 4ii839ih An accurate grasp of COVID-19 situation is considered highly important. The website we launched provides graphs of COVID-19 cases and deaths per one million population over time including trajectory analysis, and one can easily grasp the COVID-19 trend and adequately compare the situation between countries through this interactive graph system. A c c e p t e d M a n u s c r i p t Infection with the novel coronavirus SARS-CoV-2 has become a pandemic and has caused many deaths worldwide. Therefore, an accurate grasp of the SARS-CoV-2 [2, 3] , World Health Organization (WHO) situation reports [4] , and population data of the United Nations [5] are presented, and one can easily grasp the trend of COVID-19 and adequately compare the situation between countries through this interactive graph system. Furthermore, the graphs of trajectory analysis are also available. As an example easily obtained in the website, the transition of COVID-19 cases and deaths over time in several G20 countries are presented in Fig. The chart indicates that countries except for Japan have nearly the same increase ratio (i.e., the slopes of the graph are parallel on a logarithmic scale), while the increase ratio is obviously lower in Japan than in other countries for both cases and deaths. The reason for the difference is currently unclear and the situation continues to be unpredictable. This website is provided not only for researchers but also for anybody interested in the A c c e p t e d M a n u s c r i p t An interactive web-based dashboard to track COVID-19 in real time European Centre for Disease Prevention and Control (ECDC) Coronavirus disease 2019 (COVID-19) situation reports A c c e p t e d M a n u s c r i p t