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Allergies are the immune system's specific reaction to a normally harmless substance such as pollens, certain foods, or medicines. There are two main types, seasonal and perennial. The seasonal variety occurs at specific times of the year, while the perennial variety can happen year-round. In many cases, successful treatment involves medication, reducing contact with specific allergens, or shots.
  • Last Modified: Friday 13 October 2017, 13:56:31.