Not mentioned here is tail risk: what degree of extremely serious global harm is possible far outside that of seasonal influenzas? Not trying to predict the ris

Not mentioned here is tail risk: what degree of extremely serious global harm is possible far outside that of seasonal influenzas? Not trying to predict the risk of that happening, but rather, what is the world's exposure if it does? Not about fear-mongering: rather, seems better to mitigate exposure to extreme harm rather than be anxious about the possibility of it happening.