Graham,There is evidence that shows an incredibly small amout of children react very badly to the whooping cough/measles/chicken pox vacines. I was part of a team of technicians and therapists hired by the State of New York to develop a support system for a child with this allergic reaction caaused disability. This child was one of three in the state.
Sure the numbers are minuscule but tell that to a Mom. My wife and I had serious second thoughts regarding our sons when they ad the vaccines.
Don