Warts are small harmless tumors of the skin caused by a virus called the human papillomavirus. The three most common types of nongenital warts include common wa...learn more »
Skin cancer is the most common of all human cancers. Some form of skin cancer is diagnosed in more than 1 million people in the United States each year.
Can...learn more »
HIV has killed about 25 million individuals, and approximately 40 million people are currently living with the disease. Symptoms and signs of HIV include fever...learn more »