Table 1. Annual Estimated Incidence and Case-Fatality Ratios Associated With Invasive Haemophilus influenzae Disease, by Age Group and Serotype—United States, 2009–2015.
| Serotype b | Non-b Serotypes | Nontypeable | Totala | |||||
|---|---|---|---|---|---|---|---|---|
| Age, y | Incidenceb (95% CI) | CFR, % | Incidenceb (95% CI) | CFR, % | Incidenceb (95% CI) | CFR, % | Incidenceb (95% CI) | CFR, % |
| <1 | 0.30 (.13–.50) | 10.0 | 2.53 (2.05–3.11) | 3.4 | 5.63 (4.92–6.49) | 9.7 | 8.45 (7.55–9.46) | 8.2 |
| 1–4 | 0.08 (.04–.14) | 0 | 0.71 (.57–.85) | 2.0 | 0.68 (.55–.82) | 4.1 | 1.47 (1.27–1.66) | 3.5 |
| 5–17 | 0.02 (.01–.03) | 0 | 0.09 (.07–.13) | 4.7 | 0.24 (.20–.29) | 3.8 | 0.35 (.30–.41) | 3.4 |
| 18–34 | 0.01 (.00–.02) | 0 | 0.08 (.06–.10) | 12.0 | 0.35 (.31–.40) | 9.1 | 0.44 (.39–.49) | 8.8 |
| 35–49 | 0.00 (.00–.01) | 0 | 0.23 (.19–.27) | 10.0 | 0.45 (.40–.51) | 7.0 | 0.68 (.62–.75) | 7.8 |
| 50–64 | 0.04 (.02–.06) | 0 | 0.67 (.59–.73) | 12.6 | 1.08 (1.00–1.18) | 13.7 | 1.78 (1.68–1.90) | 12.9 |
| >65 | 0.04 (.03–.08) | 11.8 | 1.27 (1.14–1.37) | 13.7 | 4.99 (4.78–5.23) | 21.3 | 6.30 (6.05–6.55) | 19.9 |
| Total | 0.03 (.02–.03) | 3.9 | 0.45 (.42–.47) | 10.8 | 1.22 (1.18–1.26) | 16.1 | 1.70 (1.65–1.74) | 14.5 |
Abbreviations: CFR, case-fatality ratio; CI, confidence interval.
a
Includes cases with an unknown serotype.
b
Cases per 100 000 persons per year.