If you see the CDC as an authority then you'd also see Stripes policy as overkill since CDC isn't recommending people work from home or cancel travel within the US or restrict visitors to their offices.
1. Like that there are only 15 infected people and that number will only go down.
NPR made the case that Hong Kong sacrificed too much for containment, but the underlying message is that their containment is working.
https://www.npr.org/sections/goatsandsoda/2020/03/01/8103920...
Edit: HK center for health protection https://www.chp.gov.hk/en/index.html