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After the death of five babies health authorities have also known an epidemic of whooping cough, California as pertussis declared. The announcement came after the authorities a sharp spike in reports of pertussis, noticed that often mistaken for a cold or flu and is very strong of contagious.A CDC study suggests that the resurgence of whooping cough due to the vaccine cause increased and more virulent toxin modified.system CDC acknowledges that whooping cough highly vaccinated Ländern--recurrent is and that it is not only because some children are not vaccinated, although this can be a factor.According CDC: "the basic concept of pertussis has been attributed to improved diagnosis, reduced to various factors including awareness, vaccination coverage, suboptimal vaccines, dwindling vaccine-induced immunity and pathogens adaptation...""Pathogens adjustment is supported by several observations."In other words, caused the vaccination against whooping cough to develop pathogens pathogens with a more virulent strain.
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