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Volume 16, Number 1—January 2010
Letter

Age-based Human Influenza A Virus (H5N1) Infection Patterns, Egypt

Alan SchroedlComments to Author 
Author affiliation: Anthrometrix Corporation, Salt Lake City, Utah, USA

Main Article

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).

Main Article

References
  1. 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
  2. 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
  3. 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
  4. 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;353:255967. DOIPubMedGoogle Scholar
  5. 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;342:2329. DOIPubMedGoogle Scholar

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