The author of this article, Betty Lewis, was a Registered Vet.Tech. from 1973 - 1987, when she then left that profession and opened up her own holistic consulting business, and I am hoping that her professional credentials will lend some added weight to her observations and her own research. I'm more than aware of all the resistance to what countless holistic and homeopathic vets. have been trying to educate others about for many decades, and that this resistance is actually often the strongest amongst mainstream, allopathic vets. and their 'students', the mainstream vet. techs. But Betty was a vet. tech. herself, and I am truly hoping because of that, her message might be taken more seriously.
My own acc*umulated knowledge about the atrocities imposed upon our companion animals (and the wiser & safer ways of tackling health problems, including vaccinosis effects) is, I know, most often ignored by most folks, mainly because I can't point to a piece of paper on my wall, called a "formal degree" in this or that. But from working with our own world-famous homeopathic vet., Dr. Don Hamilton, as well as our local holistic vet., and from copious reading and listening to other such professionals and lay-people alike, as well as seeing firsthand the life-long (including a life cut short

And to drive this point home before I give the link, here is a small excerpt from Betty Lewis's article, which SHOULD get (and fully deserves!) your attention:
Myth #1: that the administration of vaccines is safe.
A British group, called Canine Health Concern (CHC) an*alyzed the post vaccinal histories of 3800 dogs.....
“We have been able to show a definite statistical correlation between a vaccine event and the onset of a number of specific illnesses. Our published conclusions have satisfied mathematical or inferential statistical tests at a level of confidence of 99% or better.
"Overall, we found that 66% per cent of all sick dogs start being sick within three months of vaccination, which is considerably more than double the expected rate of illness. Worse, 49% of all illnesses reported in the survey occurred within 30 days of vaccination. This is over five times the expected percentage if vaccination had no bearing on subsequent illness. More damning still, 29% of sick dogs first became sick within seven days of their vaccine jab. This means that a dog is 13 times more likely to become ill within seven days of vaccination than at any other time.
In the study, 69.2% of allergic dogs first became allergic within three months of being vaccinated - more than double the expected number. 55.8% of dogs with autoimmune disease developed the condition within three months of being vaccinated - again, more than twice the expected figure. Of dogs with colitis, 65.9% developed the complaint within three months of being vaccinated and, of dogs with dry eye/conjunctivitis, 70.2% developed their conditions within three months - both nearly three times higher than expected. 73.1% of dogs with epilepsy first became epileptic within three months of vaccination. As 2% of all dogs in the UK are epileptic, vaccines are clearly causing horrendous damage. For statisticians, our Chi score for epilepsy is 96: any Chi test statistic higher than twelve gives a 95% confidence about the conclusions. Without doubt, then, the majority of epileptic dogs in our survey are vaccine damaged.
"But perhaps most astonishing is the fact that a majority of dogs (64.9%) with behavioral problems appear to have developed their difficulties within three months of vaccination. Similarly, 72.5% per cent of dogs with nervous or worrying dispositions became nervous within three months of their jabs (with a Chi score of 112), and 73.1% per cent of dogs with short attention spans lost their attentiveness within three months of vaccination.
"Other diseases that were highly represented within three months post vaccination included cancer (35.1%), chorea (81%), encephalitis (78.6%), heart conditions (39.2%), kidney damage (53.7%), liver damage/failure (61.5%), paralysis of the rear end (69.2%), and pancreas problems (54.2%)."
See Betty's article in its entirety here. Oh, and before anyone asks.....of COURSE this applies to ANY living creature, including cats.