Ordinary
- 0ccurs every year during the winter
- affects 10 to 15 per cent of the UK popuation
- most people recover within 1 or 2 weeks without medical treatment
- can be identified in advance and a vaccine can be made (this immunisation is known as the flu jab and helps protect people from ordinary flu)
Pandemic flu
- occurs during any season
- affects more people than ordinary flu (up to half the population)
- is a more serious infection
- people of all ages may be at risk of infection
- a vaccine cannot be made because the virus strain has not been identifed
- antiviral medicine is stockpiled to treat people
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