DPT was on the market for over 50 years, since 1940. Based on a reading of the medical journals from 1940 to 1996, doctors knew that the P portion was neurotoxic and continued to use it even though the controversy raged in their own professional journals.
A study by the UCLA Medical School and the Los Angeles County Department of Health Services in the early 1980s linked the DPT shot in Los Angeles County to SIDS.
http://www.scribd.com/word/fragment/...nation-Crisis? upload_id=8269205 - 25k
www.nvic.org/Diseases/whooping.htm - 107k
www.*********/vaccine/sids.html - 16k
Keep in mind that whenever a baby dies of SIDS, the police treat the investigation as a homocide with the grieving parents the primary suspects. This was told to me at a first aid instruction class for child first aid and CPR.