Before revision:  We anticipate an unprecedented opportunity to leverage the posts generated by the social media users to build a real-time  analytic system for gathering and circulating vital information of the COVID-19 propagation  . Specifically, the vision of CovidSens attempts to answer the questions of: how to track the spread of the COVID-19?
After revision:  We anticipate an unprecedented opportunity to leverage the posts generated by the social media users to build a real-time sensing and analytic system for gathering and circulating vital information of the COVID-19 propagation . Specifically, the vision of CovidSens attempts to answer the questions of: how to track the spread of the COVID-19?