I think you're thinking of the Cutter incident in the '50s, where they didn't properly weaken the live polio vaccine and it lead to cases of paralysis. I saw te

I think you're thinking of the Cutter incident in the '50s, where they didn't properly weaken the live polio vaccine and it lead to cases of paralysis. I saw temporary blindness listed as a rare side effect of the DTP combined vaccine, but little else. fwiw I did not notice any long-term side effects from my three Pfizer shots, nor did anyone I personally know.