Well, this study supports Andrew's finding of gastrointestinal disease in autism, and the worse the disease, the worse the autism. He was one of the doctors who debunked Wakefield's case study, yet he uses on of his papers as a reference for this research:
Actually, most of the transmission of whooping cough to newborns is from their vaccinated parents and siblings. The vaccine has been found to only last 3 years so because people are vaccinated repeatedly through childhood and teens, it wears off at a time they are childbearing. In the past, the majority of people had whooping cough as children so they developed life-long immunity to it so could not infect their own children and in the past, most mother's who had had whooping cough, also breast fed which meant their babies were protected from whooping cough during the vulnerable newborn phase.
These days, most mothers don't have the benefit of natural immunity and a lot of mothers formula feed. In fact, most are formula feeding after the age of 6 weeks.
'Despite widespread vaccination against Bordetella pertussis, disease remains prevalent. Acellular Pertussis vaccine may be less effective or durable than previously believed. Its clinical efficacy has yet to be evaluated in North America. At the epicenter of the largest outbreak in decades, we examined pertussis incidence and vaccine efficacy in a well-defined, vaccinated community. Methods: We reviewed 171 patients with a positive PCR for B. pertussis from March 1 to October 31, 2010 for demographics and vaccination status. Results: We found 132 cases of clinical pertussis in patients age <19, with peak incidence in ages 8-14. Testing rate peaked in infants, but remained nearly constant in other ages. The case rate markedly increased after age 7, peaking at age 12 and appeared to correlate to an increased interval since vaccination. Unvaccinated children accounted for very few cases. Conclusions: The 2010 pertussis outbreak was an excellent natural experiment to assess the American acellular pertussis vaccine.'
http://www.telegraph.co.uk/health/healthnews/7736958/Babies-should-be-given-MMR-jab-earlier-to-cover-immunity-gap-for-measles.html (Results showed that vaccinated women had far fewer antibodies than women who were naturally immune).
http://www.ncbi.nlm.nih.gov/pubmed/2482004 (Breast milk protecting against whooping cough, hib and meningitis).
Also, the vaccines don't technically immunize, they change the presentation of the disease, so for instance, a vaccinated person with whooping cough would not necessarily cough but would still be infectious and capable of passing it on to a newborn baby or an unvaccinated child. At least with an unvaccinated child, you know this is whooping cough so you keep your child indoors. Whereas the vaccinated child you don't know so you could be visiting new babies etc thinking you can't pass it on. Here is a research article you can get by logging in (it's free):
http://pediatrics.aappublications.org/content/104/6/1381.full (The Science and Fiction of Pertussis Vaccines).
There's far more to it than Wakefield or autism and most parents who choose not to, don't do it to prevent autism, but for wide-ranging reasons. The autism issue is a fairly recent one and is but one small part of a much more complex problem.