WHO has confirmed 985 cases of H1N1 infection worldwide . Canada reports illness declining there ; WHO says it may return . Canada has largest number of confirmed cases , followed by U.S. , WHO says . ( CNN ) -- Canadian officials claim pigs at farm have been affected by illness .
WHO has confirmed 985 cases of H1N1 infection worldwide . Canada reports illness declining there ; WHO says it may return . Canada has largest number of confirmed cases , followed by U.S. , WHO says . Canadian officials claim pigs at farm have been affected by illness .