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Big Surprise - Whooping Cough Spreads Mainly through Vaccinated Populations

Big Surprise - Whooping Cough Spreads Mainly through Vaccinated Populations

Story at-a-glance -

  • A new study showed that 81 percent of 2010 California B. pertussis whooping cough cases in people under the age of 18 occurred in those, who were fully up to date on the whooping cough vaccine (compared to 8 percent who had never been vaccinated)
  • The whole cell pertussis vaccine (DPT) and the newer acellular pertussis vaccine (DTaP), which is now used in the U.S., are far from 100% effective. In the featured study of DTaP vaccine, researchers noted the vaccine’s effectiveness was only 41 percent among 2- to 7-year-olds and a dismal 24 percent among those aged 8-12;
  • The DTaP study also suggested that the acellular pertussis (whooping cough) vaccine loses much of its effectiveness after just three years. This is much faster than previously believed, and is thought to be one reason why there have been increases in whooping cough cases in the U.S. in recent years
  • There is also evidence that the B. pertussis organism has evolved to evade widespread use of pertussis vaccine, creating a new B. pertussis strain that is not covered in the vaccine and is causing much more serious disease, which is considered to be another reason why B. pertussis whooping cough cases are on the rise
  • Pertussis vaccine in the combination DPT shot for diphtheria-tetanus-pertussis that is supposed to prevent whooping cough has caused brain inflammation, permanent brain damage and death in some children since it was used on a mass basis in the U.S. starting in the late 1940s and DTaP vaccine has also been associated with brain inflammation, permanent brain damage and death, although it is thought to occur less frequently than for whole cell DPT vaccine

By Dr. Mercola

In 2010, the largest outbreak of whooping cough in over 50 years reportedly occurred in California.


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