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Influenza - Pandemic Flu <br /> • Pandernic influenza can occ r <br /> whenever there is a completely <br /> w strain of influenza wher <br /> there is no iunity <br /> • Pandemic refers the number of <br /> countries-notcountries- not the severity <br /> • Avian it g <br /> major concern <br /> m <br /> Influenzas ill mutate and a r <br /> cyclical : the current strain <br /> mutate and become moresevere <br /> later i fall rly winter <br />