Percentage of participants who had at least
Infection  Mean incidence (episodes per person × year)  Percentage of episodes requiring hospitalization  1 episode  3 episodes  5 episodes
URTIs  2.4 ± 1.7  1.3  90.0  42.7  12.6
Otitis media  2.8 ± 1.7  0  96.0  52.8  17.1
GI infections  1.0 ± 1.1  3.4  58.8  10.6  0.5
LRTIs  1.7 ± 1.7  31.4  73.4  26.6  5.5