A difficult one. For me it feels a shame to discriminate against all Chinese guests when the warning is only relating to one area in China. @Jason1306
https://www.bbc.co.uk/news/world-asia-china-51176409
There are also outbreaks in Thailand and Korea. Are you going to ban guests from these countries too?
The reality is that there are infectious diseases in all part of the world that can be transmitted by human to human or human/animal contact.
WHO reports globally that there are two disease outbreaks every week in various parts of the world.
https://www.who.int/westernpacific/news/commentaries/detail-hq/china-virus-outbreak-shows-asia-needs...
Absolutely we need to be mindful of any potential risks around disease outbreaks.
Hopefully Airbnb should have some advice on its website for hosts.