Graz, AUSTRIA:  Men remove cats at the animal shelter Arche Noah in Graz 06 March 2006. Three cats were at one point carriers of the H5N1 bird flu virus in the southern Austrian province of Styria but two of them have since rejected the virus, a health official said late Monday.  AFP PHOTO  Markus Leodolter  (Photo credit should read MARKUS LEODOLTER/AFP via Getty Images)