80% mortality rate. So I'm guessing the 20% that were left over probably weren't doing too great either.

If something like this got out you would still have a large portion of the population saying they know they will be the 1 in 5 that are okay. Not contemplating the being okay in that scenario probably at least means being on oxygen the rest of your life and permanently feeling like you're almost a hundred years old and probably the functional equivalent.