We present our estimate of basic reproduction number, R0, of the COVID-19 for each county. R0 is the average number of people who will catch COVID-19 from one infected person. If R0 < 1, one expects the number of new cases each day to decrease and the region is "cold"; if R0 > 1, one expects the daily new cases to increase and the region is "hot". You may find the estimate of your own region through the dropdown menu. We will present more results in the future.