Arrgh, that must suck for them. Taiwan is one of the few countries on top of this crisis. OTOH the tour company should have cancelled the tours long ago.
The numbers are much higher - this was just 1 company.
A lot of groups are also affected by EK cancelling DXB-TPE - partially due to the government applying 14 days of quarantine, including inbound crews.
Now the confirmed numbers are jumping - mostly due to people who are still travelling - and people are starting to feel things are getting out of control.
https://www.flyertalk.com/forum/32197801-post771.html has more details and thoughts.