I think the best example of the infection/mortality rates can be found from the Diamond Princess Cruise that was quarantined in Japan. This was an ideal scenario for measuring infection rates since it was a contained environment. Of the 3,711 total souls on board, only 634 (17%) tested positive for COVID-19. Of those, 328 showed no symptoms. In total, 7 cases were fatal. What is interesting is that a number of crew were found to be infected, including food handlers. And the fact that there were no preventative measures in place since no one onboard knew about COVID-19. If 83% of those exposed to the virus in a contained environment did not contract it, then I think the hysteria that the media is creating is unwarranted.
Data: https://www.medrxiv.org/content/10.1101/2020.03.05.20031773v2.full.pdf
That IS very interesting. I have not seen those stats before.