[HangnJudge]

… Having known someone who almost died after first contracting chicken pox at age 18

Or remember first hand the Polio epidemic…
Or have served in a leprosarium

[pierrem15]

Yeah. When I was kid, even after the Polio vaccine, my mom wouldn't let us out to play or go to the pool some muggy summer days because it was 'Polio weather.'

She contracted TB when she was a teenager during the Depression and almost died: it got into her bones and she lost all almost all her teeth. I kept getting tossed out of school when my TB tine tests showed positive because I picked up immunity in utero.

Two generations of vaccines and antibiotics and we've already forgotten how awful infectious diseases were.