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When the body has an exaggerated response to a substance (e.g., food or drug). Also known as an allergy.


Red, raised marks on the skin that appear suddenly. It is usually itchy or painful. Hives can be caused by an allergy, stress, infection or even heat and cold. Also known as urticaria.

Herpes Zoster (Shingles)

Shingles is a viral infection caused by the same virus that causes chickenpox (varicella virus). Anyone who has had chickenpox can get shingles, but it is most common over age 50. A person can get shingles more than once.    Shingles…

Hepatitis B

Hepatitis B is a serious liver infection passed person-to-person through blood and other bodily fluids. Pregnant women can pass Hepatitis B to their babies during childbirth, which is why newborns are given a Hep B vaccine at birth.

Hepatitis A

A highly contagious viral disease people can catch eating or drinking contaminated food or water. While Hep A will go away on its own after a month or two for most people, it can be more serious or fatal for…

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