Serogroup distribution by age, 2010–2011.

Note:*In 2010 two isolates serogroup C and two W135 not were include because age information was not available.**In 2011 one serogroup B and one W135 isolates not were include because age information was not available.注： * 2010年的2株血清群C（serogroup C）分离株与2株W135血清群分离株，因未获取年龄信息未被纳入本数据集。 * 2011年的1株血清群B（serogroup B）分离株与1株W135血清群分离株，因未获取年龄信息未被纳入本数据集。