At the end of 2019, a novel human virus (SARS-CoV-2) causing severe acute respiratory syndrome (SARS) expanded globally from China. In February 2020, the World Health Organization (WHO) officially named this infectious disease coronavirus disease 2019 (COVID-19), and in March 2020, WHO announced COVID-19 a global pandemic. In June 2020, according to an interactive web-based dashboard to track COVID-19 in real time developed by the Johns Hopkins University Center for Systems Science and Engineering (https://www.eficiens.com/coronavirus-statistics/), more than 7 million people […]