In a double-blind, placebo-controlled study, appearing in Clinical Infectious Diseases (2012 Feb; 54(3): 340-6), 263 children who had been treated for urinary tract infections were given either cranberry juice or  a placebo daily for a period of six months. Only 16% of children in the cranberry juice group contacted at least one urinary tract infection, compared to 22% in the placebo group. The total number of recurrences of urinary tract infections was 47 in the placebo group compared to 27 in the cranberry group. Overall, the cranberry juice group took fewer antibiotics. These results suggest that cranberry juice can reduce the recurrence of urinary tract infections in children, just has it has been demonstrated to do so in adult women.