Influenza

Influenza - Influenza Ieuan Davies Signs and Symptoms...

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Influenza Ieuan Davies
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Signs and Symptoms Influenza is an acute, viral respiratory infection. Fever, chills, headache, aches and pains throughout the body, sore throat which may lead to bronchitis or pneumonia. Vomiting and diarrhoea may also occur. Many deaths have been attributed to influenza
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Influenza Pandemics A pandemic is a world wide spread of infection occurring in many countries simultaneously. Flu pandemics occur approximately every thirty years. Flu pandemics occur because a new strain of the virus emerges for which people have no immunity and there are no vaccines available.
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Pandemics New flu viruses occur due to mutation Mutation occurs because different strains of influenza virus can exchange genes by infecting different animals Avian influenza viruses can exchange genes with human influenza viruses creating hybrid strains
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1918 - 1919 pandemic This killed between 20 – 40 million people Face masks were worn but provided little protection against infection
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Influenza - Influenza Ieuan Davies Signs and Symptoms...

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