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Head Lice (Pediculosis)

What are head lice? Also called Pediculus humanus capitis (peh-DICK-you-lus HUE-man-us CAP-ih-TUS), head lice are parasitic insects found on the heads of people. Having head lice is very common. However,…

Heart Disease

About Heart Disease Heart disease is a broad term that includes several more specific heart conditions. The most common heart condition in the United States is coronary heart disease, which…

Hemorrhoids

What are hemorrhoids? The term hemorrhoids refers to a condition in which the veins around the anus or lower rectum are swollen and inflamed. Hemorrhoids may result from straining to…

Hepatitis A

An Overview of Hepatitis A Hepatitis A is an acute inflammatory disease of the liver. In 2005, nearly 4,500 cases of hepatitis A were reported to the Centers for Disease…

Hepatitis B

Hepatitis B (serum hepatitis) What is hepatitis B? Hepatitis B is a liver disease caused by the hepatitis B virus (HBV). The virus can cause lifelong infection, cirrhosis (scarring) of…

Hepatitis C

An Overview of Hepatitis C Hepatitis C is an infectious disease of the liver. Worldwide, health experts estimate 180 million people have chronic hepatitis C, with more than 4 million…

High Blood Pressure

High Blood Pressure

What is Blood Pressure? Blood pressure is the force of blood against the walls of arteries. Blood pressure is recorded as two numbers – the systolic pressure (as the heart…

Human immunodeficiency virus (HIV)

An Overview of HIV AIDS was first reported in the United States in 1981 and has since become a major worldwide epidemic. AIDS is caused by the human immunodeficiency virus,…

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