At about 12 months old (1951) I contracted diphtheria and scarlet fever at the same time. Family doctor advised my parents to look for an infant coffin. My mother and father gave me alcohol and ice baths around the clock until the fever broke. I was legally blind in one eye for 14 years after that, but had significant improvement later on. I am not an anti-vaxxer, but I do think that we have developed a vaccine cult in US public health circles.
Around that same period, I had a serious reaction to a diphtheria/tetanus shot as a toddler. The worst night my fever went up to 105 and 106. But I took all the other subsequent vaccinations over the years with no noticeable reactions.