There’s no epidemic in Thailand, travel from China to Thailand curtailed by the Chinese government. If more cases break out in Thailand you may face screening or quarantine on return.

You might want to get a flu shot before you go or when you get there (at any hospital or travel clinic). Influenza A was fairly common a few months ago (just spent three months in Bangkok).

https://www.tourismthailand.org/Articles/novel-coronavirus-2...