The biggest breakdown yet of novel coronavirus cases suggests that 80% are mild. Some patients don't show symptoms at all.

5:11pm PST - February 19th, 2020    coronavirus symptoms - Business Insider

Xiao Yijiu/Xinhua News Agency via AP About 80% of new coronavirus cases are mild, according to China's most comprehensive report about the outbreak published so far. Many patients just experience fever or dry cough, while some show no symptoms at all. The new…