Coronavirus is NOT a black swan event
A black swan event is something that you with your knowledge before it appeared could not expect. Europeans had only ever seen white swans before they arrived in Australia, and it was therefore a complete surprise.
Coronavirus were known, there had been both SARS and MERS. Pandemics are quite well know, there are even fils and various public health authorities have considered them.
For more and better written thoughts on the subject, look here: https://www.johnkay.com/2020/03/15/coronavirus-a-black-swan/