Study to Assess the Incidence of Intussusception in Children < 2 Years of Age in Singapore

Inclusion Criteria: * A male or female infant aged \< 24months at the time of diagnosis of intussusception. * Subject is diagnosed with definite, probable, possible, suspected intussusception during the period of at least one year beginning at study start. * Written informed consent obtained from the parent or guardian of the subject. Exclusion Criteria: * A male or female infant ≥ 24 months of age at the time of intussusception diagnosis. * The subject has had a radiographically or surgically confirmed case of intussusception prior to the current episode.