 Xasaraddii cudurka dilaaga ah ee HIVAids ee1980-meeyadii wuxuu kasoo billowday daanyeerrada waawayn, intii u dhaxaysey 2004-07-dii cudurkii hargabkii shimbiraha ee Avian Flu, iyo doofaarrada oo keenay hargabkii doofaarka ee sanaddii 2009-kii. 