The black swan theory is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The theory was developed by Nassim Nicholas Taleb.

I believe that what WHO was looking for is the Corona-Virus
The World Health Organisation (WHO) has put scientists and health workers around the globe on alert for a new and potentially deadly pathogen – Disease […]