In July, the state of Missouri began offering for free a vaccine aimed at preventing, among other ailments, whooping cough. According to officials, the TDap vaccine, which reportedly prevents tetanus, diphtheria and pertussis, was necessary because "of the rising incidence of whooping cough is reported to be related to the vaccine wearing off if given more than ten years earlier," says an online report.

Citing a St. Louis Post Dispatch article, Michelle Goldstein of VacTruth.com says some 41,000 cases of pertussis occurred in the U.S. in 2012, compared to less than 19,000 cases in the previous year - thus the need for the new vaccine.