A liver transplant is surgery to replace a diseased liver with a healthy liver from another person.

Detailed information on children with vision problems

Detailed information on the school-aged child, ages 6 to 12 years

Detailed information on digestive inflammatory and infectious disorders in children

Detailed information on digestive disorders in children

Detailed information on preschool-aged children, ages 4 to 5 years

The poliovirus destroys the nervous system, causing paralysis. Today, polio is extremely rare in the United States because of the polio vaccine. It's still common in other countries, though, so children still need to be immunized.

Pneumococcus bacteria can cause serious illness in children, including pneumonia, infection in the blood, and meningitis.

Detailed information on the stages of play for all ages

H. pylori (Helicobacter pylori) is a spiral-shaped germ (bacteria) that infects the stomach. It can damage the tissue in your child’s stomach and the first part of the small intestine (duodenum). This can cause redness and swelling (inflammation). It may also cause painful sores called peptic ulcers in the upper digestive tract.