For instance, the death rates appear to have a distribution mostly impacting the elderly (incidentally those who are also most likely to have a weaker immune system, but also believe in less conventional medicine:
80+ years old 14.8%
70-79 years old 8.0%
60-69 years old 3.6%
50-59 years old 1.3%
40-49 years old 0.4%
30-39 years old 0.2%
20-29 years old 0.2%
10-19 years old 0.2%
0-9 years old no fatalities
https://www.worldometers.info/coronavirus/coronavirus-age-se...
Not saying this isn't bad, the current stats are showing something around a 0.7% mortality rate[2][3]. The real scare here, is like the spanish flu, there's a chance it can evolve into a more deadly strain (such as SARS) the more people who contract it. If that's the case, we could be seeing 10% fatality rates across the board.
If you're interested in the history of the spanish flu, there's a great series here: https://www.youtube.com/watch?v=XQ9WX4qVxEo&list=PLhyKYa0YJ_...
In any case, general point, people American's aren't super worried about it because we have a great healthcare system, and it's spread is limited thus far. I do think a panic will set in as every major city likely now has infected individuals. So it's a good time to pull out of the market.
[2] https://www.statnews.com/2020/02/25/new-data-from-china-butt...
[3] https://www.marketwatch.com/story/coronavirus-update-79339-c...