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Read the book's introduction The Problem of Peanut Allergy at UTNE Reader.
Canadian allergist Dr. Peter Vadas explains that the epidemic of peanut allergy in children (2001) has been caused by early childhood vaccination.
Heather has done for allergies what Jared Diamond did for broader concepts of human history in his book, Guns, Germs and Steel. Although she is not a scientist, she used her gift for synthesizing a wide range of scientific disciplines and history to arrive at a simple, coherent, integrated, and common sense hypothesis that, for the first time, convincingly explains the sudden onset of the allergy epidemic. Her theory accounts for its steep rise in America in the early 1990s, and its subsequent movement from western nations into the developing world.
Robert F. Kennedy, Jr.
Foreword to The Peanut Allergy Epidemic.
In the early 1990s, tens of thousands of children with severe food allergy arrived for kindergarten at schools across Canada, the UK, Australia and the US.
This sudden phenomenon of life threatening allergy just in kids in specific countries occurred simultaneously, without warning and quickly intensified.
It captured the attention of school professionals like Toronto teacher Wendy Harris who in 2000 recalled:
About a decade ago, the sudden surge in highly allergic children entering school systems across the province caught many educators off guard…
Eyewitness accounts of the phenomenon of allergic kindergarteners in Canada mirrored those in the UK where on the upscale Isle of Wight doctors noticed a change in sequential cohorts of children born there between 1989 and 1996. Peanut allergy had emerged suddenly and then rapidly increased from .5% to 1.5% of children.
In this same window of time peanut allergy erupted in children in Australia.
In the Australian Capital Territory (ACT), hospital admission for food reactions increased by 400% 1993-2004 for children under five. Allergist Ray Mullins did not hesitate to call it an epidemic. By 2011, in Melbourne, 3% of children or 1 in 33 were peanut allergic.
At the same time, peanut allergy in children emerged in the US. Hospital admissions for food reactions among children soared from 2,615 in 1998 to 9,537 in 2006. NYC allergist Scott Sicherer called the increase in peanut allergy in US children ‘alarming’ after the number shot from virtually zero to almost 2 million in just 20 years.
For the National Peanut Board and the American Peanut Council, the allergy epidemic represents a tremendous loss of generations of peanut eaters. The industry has invested heavily in research to identify causes that, for them, has led to far more questions than answers.
The much anticipated 5 year LEAP study (learn early about peanut allergy) delivered a deflated observation in 2015: a major risk factor in developing peanut allergy is allergy. In other words, infants as young as 4 months in this study were at risk for peanut allergy because they already had allergies, eczema (milk allergy) and egg allergy. This circular conclusion again asked: what is causing infants under 1 year of age to develop severe food allergies?
The answer lies in what everyone has already observed in the sudden nature with which the epidemic began.
What has the power to create life-threatening allergy called anaphylaxis so suddenly just in kids, in specific countries and in the same small window of time?
In 1999, UK professor Andrew Taylor-Robinson asked:
What should be discussed is whether the price of a reduction of common infectious diseases through a policy of mass vaccination from birth is worth the price of a higher prevalence of atopy?
In 2001, Canadian allergist Peter Vadas casually observed on a Toronto TV show (youtu.be/0_o5z_Gq-BU):
…one of the spin offs [of early vaccination for children] is that there are a certain proportion of the population that are going to be more prone to developing allergies as a consequence of that.
In 2012, Scott Sicherer Pediatrics professor at Mount Sinai School of Medicine in NY stated in an email to Fox News:
The leading theory is about hygiene - with less infection thanks to city living, smaller families, vaccines, sanitation, antibiotics, etc., the immune system is less 'busy' with germs and may become more prone to attack harmless food proteins.
Vaccination causes anaphylaxis and allergy. This is undeniable. It is a fact supported by 100+ years of medical literature, a Nobel prize and every vaccine package insert.
Further investigation reveals that there is even a precedent for the current pediatric allergy epidemic. At the close of the 19th century, children in specific countries experienced the same sudden medical phenomenon, the symptoms for which required the creation of new words: allergy and anaphylaxis.
 Wendy Harris, “Abnormal response to normal things,” Professionally Speaking Magazine, Ontario College of Teachers (Toronto, Sept. 2000). http://professionallyspeaking.oct.ca/september_2000/epipen.htm
 R. J. Mullins, “Pediatric food allergy trends in a community-based specialist allergy practice, 1995–2006,” Medical Journal of Australia 186, no. 12 (2007): 618–621.
 Osborne, NJ., et al, "Prevalence of challenge-proven IgE-mediated food allergy using population-based sample and predetermined challenge criteria in infants," J Allergy Clin Immunol, 127 (3) (2011): 668-76.
 R.S. Gupta, et al, "Understanding the prevalence of childhood food allergy in the United States" Pediatrics (July, 2011). This study indicates that in 2010 there were 2% - 2.8% or 1.5 to 2 million peanut allergic children in the US which is a significant increase from a 2008 study (Sicherer) in which 1.4% children were found to be peanut allergic.
 This pattern was repeated after 2000 in Tazmania, Singapore, Hong Kong – other countries seem to be following but data are scarce.
 A. W. Taylor-Robinson, “Multiple vaccination effects on atopy,” Allergy, 54 (April 1999): 398–399.
 Discovery Health show called "Health on the Line" Episode 1014 "Allergic Disease" (Nov., 2001) http://petervadasmd.com/mediaappearances.html