Food Allergies Stir a Mother to Action

to the Editor: Ms. Severson ("Food Allergies Stir a Mother to Action") misrepresents the Hygiene Hypothesis. This holds that a childhood protected from exposure to normal dirt produces not a weak immune system, but rather one that is naive and hyper-reactive. Barry Levine1142 Brown AveLafayette, CA 94549510 220 6948