What Is Allergies? Symptoms, Causes, Diagnosis, Treatment, and Prevention
Allergies occur when your immune system is overwhelmed with substances called allergens. Common allergens that can trigger an allergic reaction include pollen, pet dander and bee venom. People are also allergic to certain foods and medicines. Who Gets Allergies? Allergies are the sixth leading cause of chronic illness in the United States. Every year, more …
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