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Fri, 14:52 22 May 2009 GMT17

 
The AlertNet Challenge
1 of 6

QUESTION 1
According to an Australian study, why are people over 60 less susceptible to swine flu than younger people?
They have some immunity because it resembles an older version of seasonal flu
They tend to gather less in large groups than younger people
They create more antibodies than younger people


URL: http://www.alertnet.org/quiz/124300356332.htm

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