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Are you scheduled for surgery? If so, you may worry about the need to replace blood lost during surgery. The goal is to keep the body's normal levels of blood. Blood transfusion is a way to reach this goal.

If both you and your partner have had sex only with each other for many years, you are not likely to be at risk for STIs. But if you have sex with more than one person, or recently had a new sex partner, this sheet is for you.

As you grow older, your sex life may change. But that doesn't mean it has to end.

HPV is a virus that causes warts. It can be hard to detect, so many people never even know they have it. Treating genital forms of HPV now can help prevent serious health problems in the future.

Sarcoidosis is a disease that causes inflammation of the body tissues. This leads to small lumps called granulomas.

Fitness walking has something for almost everyone, even people who are already fit. Walking is one of the safest ways to condition your body aerobically. It can boost energy, help you lose weight, and reduce stress.

Calories are a measure of the energy you get from food. If you eat more calories than you use, you will gain weight. If you eat fewer calories than you use, you will lose weight.

Idiopathic pulmonary fibrosis is a lung disease that causes inflammation and scarring in the air sacs (alveoli) of the lungs. This makes it harder to breathe.

Although a hernia bulge may appear suddenly, hernias often take years to develop. They grow larger as pressure inside the body presses the intestines or other tissues out through a weak area in the abdominal wall, often at the belly button, or a site of previous surgery. With time, these tissues can bulge out beneath the skin.