Old fag here.
I had measles. I had chicken pox. Friends had (and nearly died or were crippled by) whooping cough and polio.
I have a scar on my arm where I was vaccinated for smallpox before it was eradicated. My uncle died of it.
I am thankful for immunization through vaccination, truly grateful that my grandchildren don't have to go through what we did.
Those who forget the past are doomed to repeat it.