I ran into a grandmother last week whose 5 month old grandchild had pertussis because his parents refused to vaccinate - he survived, but he was lucky, he was sick for two months. This is everywhere, and it doesn't just affect newborns just because they are likely to die, my Godmother had it (again) as an adult and had petechiae on her chest from the coughing.
I had it when I was 6 months pregnant with my 3rd son, I coughed for two months and it was worst at night - even in the other room I kept my husband up at night, being immunocompromised when pregnant it was lucky I did not also get pneumonia on top of that. Fortunately for my newborn he got my antibodies when he was in the womb so that we didn't have to wait for the vaccination they gave me in hospital after his delivery to work. You see, because of my neglect (I had the booster in grad school, more then 9 years previous) I had not had my booster and that is why I had it, I could have easily passed it on and killed my own child. Even if you are well pertussis is horrible, it just goes on and on and nothing helps at all. We are so lucky to have the technology to help, why deny yourself? Why not opt into society and help everyone and prevent its spread?