I think this event qualifies as “well documented” by any reasonable standard, there was official public disclosure and an open investigation.
As one quick example, here’s a news clip including an interview with the Taiwanese health minister discussing details of the (then) ongoing investigation:
As one quick example, here’s a news clip including an interview with the Taiwanese health minister discussing details of the (then) ongoing investigation:
https://youtu.be/ecpNq0jz7cs
You can trivially find many more official statements about the event and subsequent investigation, if you like.