Whooping Cough Kills 5 in California -- State Declares an Epidemic

After the deaths of five infants, California health authorities have declared an epidemic of whooping cough, also known as pertussis. The announcement came after authorities noticed a sharp spike in reports of pertussis, which often is mistaken for a cold or the flu and is highly contagious.

A CDC study suggests that the resurgence of whooping cough is due to the vaccine causing an increased and more virulent toxin.  The CDC acknowledges that whooping cough is recurring in highly vaccinated countries -- and that it is not just because some children are unvaccinated, although that can be a factor.

According to the CDC:

"The reemergence of pertussis has been attributed to various factors, including increased awareness, improved diagnostics, decreased vaccination coverage, suboptimal vaccines, waning vaccine-induced immunity, and pathogen adaptation ... Pathogen adaptation is supported by several observations."

In other words, vaccinating against the whooping cough pathogens has caused the pathogens to evolve with a more virulent strain.