Results: From June 2012 until September 2013, the
surveillance system detected 306 pneumonia episodes
in children under 1 year of age, an incidence of 0.20
episodes/child-year (e/cy) (95% CI 0.17 to 0.22 e/cy).
The incidence in the cohort study from the same
period was 0.27 e/cy (95% CI 0.23 to 0.32 e/cy).
Pneumonia incidence in the surveillance system was
almost 30% lower than in the birth cohort; incidence
rate ratio 0.72 (95% CI 0.58 to 0.89). In the
surveillance system, 18% were severe pneumonia
cases, compared to 23% in the birth cohort, rate ratio
0.81 (95% CI 0.55 to 1.18).