Table 4.
Disease etiologies by age*
| Age (year) | Inf A n (%) (95% CI) | Inf B n (%) (95% CI) | AdV n (%) (95% CI) | RSV n (%) (95% CI) | Other n (%) (95% CI) | Neg n (%) (95% CI) | Total |
|---|---|---|---|---|---|---|---|
| <1 | 9 (12) (6·8–22·4) | 1 (1) (0·3–7·6) | 4 (6) (2·2–12·6) | 0 (0) (0·0–5·1) | 6 (8) (3·9–17·0) | 52 (72) (62·0–82·2) | 72 (one co‐infection) |
| 1–5 | 74 (18) (15·0–22·5) | 21 (5) (3·5–7·9) | 25 (6) (4·3–9·0) | 9 (2) (1·2–4·2) | 54 (13) (10·2–16·8) | 228 (55) (52·0–61·6) | 411 (10 co‐infections) |
| 6–15 | 144 (32) (28·4–37·1%) | 30 (7) (4·8–9·5) | 18 (4) (2·6–6·3) | 0 (0) (0·0–0·9) | 42 (9) (6·9–12·3) | 220 (48) (45·1–54·4) | 454 (10 co‐infections; one triple co‐infection) |
| 16–54 | 107 (15) (13·0–18·3) | 23 (3) (2·2–4·9) | 16 (2) (1·4–3·7) | 0 (0) (0·0–0·6) | 51 (7) (5·6–9·4) | 505 (72) (69·6–76·2) | 702 (12 co‐infections) |
| >54 | 24 (11) (7·4–15·7) | 10 (4) (2·5–8·2) | 8 (4) (1·9–7·0) | 2 (0·9) (0·3–3·3) | 12 (5) (3·1–9·2) | 166 (75) (69·4–80·7) | 222 (two co‐infections) |
AdV, adenovirus; CI, confidence interval; Inf, influenza; Neg, negative; PIV, parainfluenza virus; RSV, respiratory syncytial virus.
*Other pathogens – enterovirus, herpes simplex 1, PIV 1–3, Streptococcus pneumoniae, S. pyogenes, Haemophilus influenzae, β‐hemolytic streptococcus (not group A), group C streptococcus, Moraxella catarrhalis.