  The Coronavirus Disease 2019 (COVID-19) has now become a pandemic, inflicting
millions of people and causing tens of thousands of deaths. To better
understand the dynamics of COVID-19, we present a comprehensive COVID-19
tracking and visualization platform that pinpoints the dynamics of the COVID-19
worldwide. Four essential components are implemented: 1) presenting the
visualization map of COVID-19 confirmed cases and total counts all over the
world; 2) showing the worldwide trends of COVID-19 at multi-grained levels; 3)
provide multi-view comparisons, including confirmed cases per million people,
mortality rate and accumulative cure rate; 4) integrating a multi-grained view
of the disease spreading dynamics in China and showing how the epidemic is
taken under control in China.
