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What are the main allergy triggers? There are more than 240 allergens, some rare and others very common. Who’d have thought that barley, pigeon feathers, silk, egg yolk, vanilla and lentils could be allergens? |  | Drug allergies Allergic reactions to drugs are fairly rare, but almost all drugs can cause a reaction of sorts in a small number of people. Drug reactions ranging from a mild allergic reaction. |  | What you need to know about pets and allergy control You may know that cats can cause allergic reactions. What you may not be aware of is that dogs, rats, mice, guinea pigs, rabbits, hamsters, birds, horses, cows, chickens, ducks |  | Allergy, intolerance: telling the difference There are different types of non-immune reactions to food. In this article on food intolerance, DietDoc explains the basics. |  | Allergy, sinusitis - which is it? Are you in the throes of seasonal allergies? Or are you struggling with a bout of sinusitis, a condition in which the sinuses become inflamed or infected? |  | Wheeze and sneeze Whenever there's a profusion of flowering trees, grasses and even weeds, it means sneezes, runny noses and itchy eyes for many of us. |
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