In the US people have allergies to many things, the most common ones being pollen, dust mites, mold, wasps and bees, cats and dogs, industrial and household chemicals, and foods such as milk, nuts, and eggs. Growing up in Sri Lanka, I cannot remember anyone in my family or friends who had allergies, apart from a very few people who had asthma and thus had occasional breathing problems. No one seemed to have the need to avoid foods and plants, apart from varying degrees of lactose intolerance.
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