While I never intended to write a series on vaccines, I have been studying the subject intensely, as I do every 3 years (i.e. when I am pregnant). Pertussis is, for me, one of the most worrisome diseases one can vaccinate against. There have been outbreaks all over the country, it seems, over the past few years, and we saw one of our dear friends' 2-year-old go through it a few years back.
Note that this is a pro-vaccination bulletin, which outlines the problems with current pertussis vaccines:
"Be careful about reading health books. You may die of a misprint."