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HIV Transmission and the History of HIV AIDS Topic Guide
HIV Transmission and the History of HIV/AIDS: In the late '70s, the syndrome caused by the HIV virus was seen in the U.S. We now know that HIV evolved from simian immunodeficiency virus in West Africa. HIV can be transmitted via contact with an infected person's blood or other bodily fluids.
Hives and Angioedema Hives are a sudden allergic skin reaction. Hives are raised reddish bumps that cause severe itching. Angioedema is similar to hives but the welts are larger and involve a deeper layer in the skin. Allergies, insect stings and bites, stress, exercise, and infections are common causes of hives and angioedema. In mild cases, no treatment is needed. Severe reactions should be treated by a health care professional.