Man, I hope you can learn just how wrong you are about this without having to get the whooping cough yourself. Imagine having the worst coughing fit of your life... but you get these coughing fits off-and-on for three to four months. Yeah, grown-ass men will probably survive - but it does kills infants, and when it does so, the infant dies slowly and in agony.
It's also extremely communicable. And, of course, this happened in Oregon because that's where a cluster of dumber than dirt, New Age, crystal-gazing hippie freaks met a cluster of dumber-than-dirt, gullible, anti-government freedumbers and decided that all vaccines are bad and created areas where the mumps, whooping cough, and measles have had a resurgence.