by
Leadstart Publishing Pvt Ltd.
Language: English
Release Date: March 1, 2011
Allergies are abnormal reactions to ordinarily harmless substance. The sensitizing substances, called allergens, may be inhaled, swallowed, or come into contact with the skin. Allergens that most frequently cause problems are: pollens, mold spores, house dust mites, animal danders, foods, insect bites...