I suspect it might have been my post.
Also, when it comes to infectious diseases, one has to be very careful drawing broad inferences from personal history. The fact that a particular individual hasn't gotten sick from the cold, flu, Covid-19, etc. doesn't mean that other people won't. There's the luck of genetics that might make one less susceptible to disease X (and possibly more susceptible to disease Y). There's the luck of just not encountering a particular disease vector due to where you live/work/travel which is enhanced by the "herd immunity" effect of all the OTHER people in your area who DID get immunized and so kept the disease from spreading to you. Where you work and what your job is can also modify your chances. I wouldn't want to be working in a doctor's office or at a fast food counter or be a school teacher right now. Also, as of right now, 99% of the people who get Covid-19 will recover, but what about the 1% who don't? If the disease spread far enough and fast enough (which it appears to be doing in a number of countries right now, Italy, Iran, the USA), the health services will be overwhelmed and the people who are most at risk will not be able to get the supportive care they need and so the 1% fatality rate will rise. That's what the whole "flatten the curve" discussion is about. If 150 million people come down with the disease within a short period of time our health system can't cope. If you spread those case out over a long period of time our (societies) chances are better.
