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The only safe sex is no sex, most doctors say. But certain precautions and safe behaviors can reduce a person's risk of contracting a sexually transmitted disease.

When you have diabetes, you are at greater risk for periodontal disease. This disease is an infection of the gums and tissues supporting the teeth. Any periodontal disease you may develop can be more severe and harder to control. Preventing or controlling periodontal disease needs ongoing care.

Does your child have trouble sitting still or paying attention? You may have been told that ADHD (attention deficit hyperactivity disorder) may be the cause.

Choosing the right type and amount of proteins you eat is important when you have chronic kidney disease. It can affect your overall health and kidney function.

Laser therapy can be used to cut a very tiny area to remove very small cancers without damaging surrounding tissue. Lasers also are used to apply heat to tumors to shrink them. They are sometimes used with medicines that are activated by laser light to kill cancer cells.

Vaccines for COVID-19 are available. Here's what you need to know about them.

Measles is a highly contagious respiratory infection. It usually spreads when a person comes in contact with droplets from coughs or sneezes of someone with the virus.

Abdominal ultrasound is an imaging test that uses sound waves to form pictures of your abdominal organs. It can help detect organ problems, such as gallstones, kidney stones, or liver disease.

Hepatitis C is treated with antiviral medicines. In many cases, the medicines can cure hepatitis C.