Fig. 1From: Changes in the numbers of patients with acute gastroenteritis after voluntary introduction of the rotavirus vaccine in a Japanese children’s primary emergency medical centerMonthly numbers of AGE patients ≤ 15 years of age from January 1, 2011 to February 28, 2015. Black squares indicate the norovirus epidemic seasons. Dotted squares indicate rotavirus epidemic seasons. AGE, acute gastroenteritisBack to article page