It's not the unvaccinated causing the increase in the incidence of whooping cough, it's the vaccines:
Whooping cough, or pertussis, has exploded in the United States in recent years. A new study confirms what scientists have suspected for some time: The return of the disease is caused by the introduction of new, safer vaccines 2 decades ago. Although they have far fewer side effects, the new shots don't offer long-lived protection the way older vaccines do....Strange that while researchers "have long suspected" the new vaccines, the vaccine advocates writing in the media have constantly pointed at Hollywood actresses and vaccine skeptics.
Researchers have long suspected that new vaccines might have something to do with it. Until the 1990s, children routinely received a so-called whole-cell vaccine, made from pertussis bacteria, Bordetella pertussis, that were killed by exposure to formalin or other chemicals. These vaccines were known to contain a toxin that can provoke powerful side effects. Most vaccinated infants had fever and severe pain at the injection site, sometimes accompanied by febrile seizures or fainting fits in which the infant turned pale, unresponsive, and "floppy."