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To determine the burden of norovirus infections in children stools from a longitudinal community cohort were evaluated using reverse transcription polymerase chain reaction. Norovirus was detected in 21.3% of diarrheal and 8.0% of nondiarrheal stools (P < 0.01). Norovirus diarrhea was highly associated with age and the odds ratio for norovirus diarrhea fell by 2.8% per month (OR = 0.97, 95% CI: 0.95–0.99). Norovirus seems to be an important etiology of community acquired diarrhea in this study population.