The Chinese city Wuhan is the epicenter of the new coronavirus outbreak. What is the source of the infection? What should the public, health care professionals and health officials do respectively when confronted with such a public health emergency? 2. Why should Americans be more concerned about the flu epidemic rather than the new potentially deadly coronavirus? 3. What lessons can people learn from t he public health emergency caused by the new coronavirus epidemic in the Chinese city Wuhan in early 2020? 这个会作为作业,请每位同学选择以上3个问题其中一个,进行口头语音录制递交作业。