The correlation with invasive pneumococcal disease was strong at 2 weeks after activity of influenza virus and human metapneumovirus and for up to 4 weeks after RSV activity.

• 肺炎球菌感染在流感病毒和人偏肺病毒活动后2周达高峰，在呼吸道合胞病毒活动后持续4周。