The Centers for Disease Control and Prevention (CDC) is looking into whether an acute hepatitis virus related to pet dogs has killed five children in the United States
In the United States, health officials have discovered 109 cases of the unknown hepatitis virus, which attacks the liver.
The cases, which mostly affect preschoolers, occurred in 24 states and Puerto Rico over the last seven months.
According to CDC Deputy Director for Infectious Diseases Jay Butler, 90 percent of the youngsters were hospitalised and 14 percent required liver transplants.
Similar incidents have been reported in other countries. As of May 1, the World Health Organization (WHO) had identified 228 probable cases in 20 countries
A report from the United Kingdom's Health Security Agency on Friday suggested a probable link between an unusually high number of acute juvenile hepatitis cases and dogs.