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==Epidemiology and Demographics== | ==Epidemiology and Demographics== | ||
===Incidence=== | ===Incidence=== | ||
*The World Health Organization (WHO) reports an incidence of 3 to 5 million cases of severe influenza disease annually, including 250 000 to 500 000 deaths every year.[1] | |||
*The annual incidence may vary significantly depending on whether an influenza outbreak occurs or not. | |||
*During outbreaks, the influenza may infect millions of individuals with an annual death rate that ranges between 15,000 (in 2009 influenza pandemic) and 100 million (in 1918 influenza pandemic). | |||
*The case fatality rate per outbreak is also highly variable and may range from less than 1 to more than 200 per 100,000 cases. | |||
===Age=== | ===Age=== | ||
*Influenza may infect patients of all age groups. | *Influenza may infect patients of all age groups. | ||
*Determination of specific at-risk patient populations depends on the virus subtype. | *Determination of specific at-risk patient populations depends on the virus subtype. | ||
*High risk populations are elderly, young children, and adolescents. | |||
*High risk populations are elderly > 65 years, young children (especially patients < 2 years of age), and adolescents. | |||
===Race=== | ===Race=== | ||
*There is no racial predilection for avian influenza infection. | |||
===Gender=== | ===Gender=== | ||
*There is no gender predilection for avian influenza infection. | |||
==References== | ==References== | ||
Revision as of 16:02, 23 April 2015
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Avian influenza Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Avian influenza epidemiology and demographics On the Web |
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American Roentgen Ray Society Images of Avian influenza epidemiology and demographics |
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Risk calculators and risk factors for Avian influenza epidemiology and demographics |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Yazan Daaboul, M.D.
Overview
Epidemiology and Demographics
Incidence
- The World Health Organization (WHO) reports an incidence of 3 to 5 million cases of severe influenza disease annually, including 250 000 to 500 000 deaths every year.[1]
- The annual incidence may vary significantly depending on whether an influenza outbreak occurs or not.
- During outbreaks, the influenza may infect millions of individuals with an annual death rate that ranges between 15,000 (in 2009 influenza pandemic) and 100 million (in 1918 influenza pandemic).
- The case fatality rate per outbreak is also highly variable and may range from less than 1 to more than 200 per 100,000 cases.
Age
- Influenza may infect patients of all age groups.
- Determination of specific at-risk patient populations depends on the virus subtype.
- High risk populations are elderly > 65 years, young children (especially patients < 2 years of age), and adolescents.
Race
- There is no racial predilection for avian influenza infection.
Gender
- There is no gender predilection for avian influenza infection.