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The flu is an infection that affects your respiratory tract. This tract includes your mouth, nose, and lungs, and the passages between them. Unlike a cold, the flu can make you very ill.

Shingles is also called herpes zoster. It's a painful skin rash caused by the herpes zoster virus. This is the same virus that causes chickenpox.

Meningitis is inflammation of the lining around the brain and spinal cord. It’s most often caused by germs that infect the fluid and lining.

West Nile virus is an illness that mainly affects birds. But an infected mosquito can spread it to people and other animals. Here's what you need to know about prevention, symptoms, diagnosis, and treatment.

Gastroenteritis is often called the stomach flu. Bacterial gastroenteritis is caused by bacteria, and often causes severe symptoms. Read on to learn more, including how it can be spread, prevention, symptoms, and treatment.

Learn about MRSA, a type of staph infection that's hard to treat.

An existing health problem can increase your risk for falls. Taking certain kinds of medicines may also raise your risk of falls. So improving your health can help lower your risk. Read on to learn more.

You have been told your child has a problem with their vertebrae. These are the bones that stack together to make up the spine. Spondylolysis is a crack (defect) in the back part of a vertebra. Spondylolisthesis is the slipping forward of a vertebra. Here is information on the causes, symptoms, diagnosis methods, and treatments.

Your child has osteochondritis dissecans (OCD). This occurs when a small piece of bone and cartilage in a part of a joint separates from the bone around it. It's most common in the knee joint.