A clinical trial is a research study that's done to test a new type of prevention or treatment. Being part of a clinical trial means you may benefit from a treatment that is not yet available to anyone else.

Sometimes called antiangiogenic therapy, this treatment may prevent the growth of cancer by blocking the formation of new blood vessels.

A bone density test measures the strength and density of your bones as you approach menopause and, when the test is repeated sometime later, can help determine how quickly you are losing bone mass and density.

Detailed information on firearm safety and prevention.

A head injury is a broad term that describes many injuries that occur to the scalp, skull, brain, and underlying tissue and blood vessels in the head. Head injuries are also commonly referred to as brain injury, or traumatic brain injury, depending on the extent of the head trauma.

Detailed information on a child's vision milestones.

Detailed information on the most common types of screening tests for common diseases.

A lumbar strain is an injury to the lower back. This results in damaged tendons and muscles that spasm and feel sore.

Between the bones of the knees are two crescent-shaped disks of connective tissue, called menisci, which also act as shock absorbers to cushion the lower part of the leg from the weight of the rest of the body. Meniscus tears can happen when twisting while bearing weight.

Exercise is good for people of all ages. It helps lower blood pressure, reduces the risks for falls and serious injuries, and slows the body's loss of muscle and bone mass.