Search for VAERS read the page, find the link to CDC-Wonder, read the disclaimer and starting playing. I worked out an averge of 350 reports of severe adverse events ( before investigation) from influenza shots for 2006-2007 2008 2009. Start playing around.
Try the FDA because they're in charge of safe vaccine production.
One last, go to the vaccine court website. Download the full text of the 3 decided cases and work through them.