Volume 16, Number 1—January 2010
Letter
Age-based Human Influenza A Virus (H5N1) Infection Patterns, Egypt
Alan Schroedl
Table
Age groups, median ages, and case-fatality ratios for influenza A (H5N1) case-patients, by influenza season, Egypt*
| Influenza season, August–July | No. case-patients by age group, y |
Total no. case-patients | Median age, y | Case-fatality ratio | |||||
|---|---|---|---|---|---|---|---|---|---|
| 1–8 | 9–20 | 21–30 | 31–40 | 41–74 | >75 | ||||
| 2005–06 | 4 | 4 | 3 | 2 | 0 | 1 | 14 | 18.0 | 42.8 |
| 2006–07 | 13 | 5 | 4 | 2 | 0 | 0 | 24 | 6.5 | 37.5 |
| 2007–08 | 3 | 2 | 5 | 1 | 1 | 0 | 12 | 23.5 | 58.3 |
| 2008–09 |
28 |
1 |
1 |
3 |
0 |
0 |
33 |
3.0 |
15.1 |
| Total | 48 | 12 | 13 | 8 | 1 | 1 | 83 | — | — |
*Age at date of clinical sign onset; data from the World Health Organization (2).
References
- Johnston C. Concerns arise over symptomless Egypt bird flu cases. Reuters AlertNet, 08 Apr 2009 [cited 2009 Sep 17]. Available from http://www.alertnet.org/thenews/newsdesk/L7467886.htm
- World Health Organization. Situation updates—avian influenza [cited 2009 Sep 17] Available from http://www.who.int/csr/disease/avian_influenza/updates/en/index.html
- World Health Organization. Cumulative number of confirmed human cases of avian influenza A/(H5N1) reported to WHO [cited 2009 Nov 9]. Available from http://www.who.int/csr/disease/avian_influenza/country/cases_table_2009_09_24/en/index.html
- Bhat N, Wright JG, Broder KR, Murray EL, Greenberg ME, Glover MJ, Influenza-associated deaths among children in the United States, 2003–2004. N Engl J Med. 2005;353:2559–67. DOIPubMedGoogle Scholar
- Izurieta HS, Thompson WW, Kramarz P, Shay DK, Davis RL, DeStefano F, Influenza and the rates of hospitalization for respiratory disease among infants and young children. N Engl J Med. 2000;342:232–9. DOIPubMedGoogle Scholar
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