Regarding the mercury concern, there is no thimerosal in most vaccines, but both brands of Tdap include formaldehyde. Adacel also contains aluminum phosphate and glutaraldehyde, while Boostrix contains bovine extract or casein. These ingredients and their impact on health are obscured from the public.
Still there are bigger issues with the vaccine and epidemic.
A major supporter of Assembly Bill 354 was GlaxoSmithKline, one of the two Tdap manufacturers. Why are drug companies involved in creating public health laws that will increase their profits?
Also, we have responded impulsively to epidemics by increasing immunizations without understanding the pathogen or effects of vaccines. While children have been immunized for pertussis since the 1960s, and vaccination rates remain high in California, the number of pertussis cases last year rivals numbers from 1947. Why would we increase vaccinations without first addressing these anomalies?