Great point. Once you get the shot, there's no way to undo it if you start to get reactions. Here's an interesting comment from another thread.
http://www.freerepublic.com/focus/f-news/1779740/posts?page=50#50
"According to the Merck product manufacturer insert, there was 1 case of juvenile arthritis, 2 cases of rheumatoid arthritis, 5 cases of arthritis, and 1 case of reactive arthritis out of 11,813 Gardasil recipients plus 1 case of lupus and 2 cases of arthritis out of 9,701 participants primarily receiving an aluminum containing placebo. Clinical trial investigators dismissed most of the 102 Gardasil and placebo associated serious adverse events, including 17 deaths, that occurred in the clinical trials as unrelated."
From NVIC
This is one reason vets are swamped on a daily basis with sick dogs and cats... autoimmune disease from too many vaccinations. Since animals have a shorter lifespan than humans, it will take longer, but in time we'll see the same significant weakening of the gene pool from vaccines as our pet populations.