TABLE 1

Age Distribution of Identified SOIs, 2006–2013

Source of InfectionN% With Known AgeMedian Age (y)Range (y)
Sibling2029681–19
Mother11785281–43
Father57722820–51
Grandparent43675737–74
Aunt/uncle377623.55–74
Other, not specified3686120–52
Day care26625.51–44
Cousin26888.50–30
Friend1765131–37
Babysitter41001710–19
Niece/nephew366.711.56–17
Unknown11003
Overall56984.4140–74