Mar 19 2020
Prof. Petralia:
One important comment, that I have learned in these difficult days:
Mortality is N° of deaths / entire population (of Italy, for example)
Fatality is N° of deaths / affected people (largely underestimated in this case in Italy, because they test only symptomatic)
This explains why the fatality of South Korea is much lower than us, because they tested everyone, while we only test very symptomatic people! Therefore, we need to use the term “fatality”, and avoid using “mortality”, that is misleading.