How many cat owners here have had one of them have a bad reaction to a vaccination?

She's fine now but my cat, Maggie, had her distemper vac two weeks ago. Initially all was ok but 3 days later she stopped eating and became very lethargic. Through an overly long and expensive series of consultations we finally came to the conclusion, one that my vet was initially reluctant to agree with, that is was a delayed reaction to the jab. A stimulant to trigger her appetite worked wonders and she recovered very quickly.

My research and correspondence with another vet online suggests that it's more common than many vets would admit to.

I'm just trying to determine how common it really by asking as many cat owners as I can to come up with some sort of number... even though the
results will be non-scientific even anecdotal evidence will be helpful.