The best source I can find is http://www.huffingtonpost.com/meredith-broussard/food-allerg... .

  A call to the CDC press office revealed that the number of 
  deaths from food allergies, as collected from 2.5 million 
  death certificates across the country, is miniscule. Only 
  eleven people died from food allergies in 2005, the last year 
  for which we have data available. More people died from 
  lawnmower accidents.