I unfortunately had a cat pass away from a vaccination. Off the top of my head, I can't remember which one. He just had a bad reaction to it and was gone the next day. I've grown up with many cats and that was the only one that ever had a bad reaction. Even after that happened, all cats I had after him still went straight to the vet and got all their vaccinations.

It was so immensely sad, but it didn't prevent me from continuing to vaccinate my animals.