なんなんだろうか? たんに日本は安全だということ? 世界が過剰反応をしているという判断から?
In the new Japan and Hong Kong advisories, the CDC specifically mentions it "does not recommend canceling or postponing travel."
https://www.usatoday.com/story/travel/news/2020/02/20/coronavirus-hong-kong-japan-cdc-travel-advisories/4817996002/