Slow accrual.

Human Breast milk in young children with Norovirus Infection

The investigators hypothesize that children with clinically significant norovirus infection of the gut who receive enteral human milk will more successfully clear the virus or experience improved symptoms compared to children not receiving human milk.

Inclusion Criteria:

• Children with at least two stool samples taken at least 7 days apart that are positive for norovirus
• Child has an underlying disease or has received immunosuppressive medication or chemotherapy such that clearance of norovirus is expected to be impaired.

Exclusion Criteria:

• The presence of other pathogens causing diarrhea that have specific treatments does not preclude enrollment. However, specific treatment should be offered in addition to human milk.