Figure 2.

Distribution of primary RSV infections in children by age at first infection and severity of infection (as indicated by contact with healthcare), England, 2008–2013 (n = 490 children)

CI: confidence interval; RSV: respiratory syncytial virus.

Left-hand side shows the number and proportion of children first infected aged < 1 year old, right-hand side show the proportion of children first infected aged 1–2 years old (that is, they were never infected at age < 1). We present the number of children who contacted healthcare using a broad definition of RSV season (October–February) and peak RSV season (November–January).