A puzzling outbreak of sudden liver disease in nearly 200 children has health authorities in Europe and the U.S. racing to find answers.
The illnesses have no known connection, although a possible link with a virus that can cause colds is being investigated.
At least one child died and several others have required liver transplants.
Jaundice, diarrhea and abdominal pain are among reported symptoms. Children aged 1 month to 16 years have been affected.
Hepatitis is usually caused by one of several contagious hepatitis viruses that have not been found in the affected children.
Some types of the virus can cause colds but authorities are also looking at a version that can cause digestive problems