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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).

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