The Ministry of Health, Labor and Welfare has posted a Q & A on the new coronavirus on its website.
If you want to check the website in a foreign language, you can access it from the following site.
☛Information in English:
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/newpage_00032.html
☛Information in Chinese
https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/newpage_09534.html
I think that you can understand the appropriate response by checking the information. Please make use of the above information.