Ngwa a dabara adaba maka nchọpụta qualitative nke nje virus nucleic acid na ọbara ọbara nke ndị ọrịa, ma na-enye ụzọ enyemaka dị irè maka nyocha ụlọ ọgwụ na ọgwụgwọ ọrịa nje virus Yellow Fever.Nsonaazụ ule a bụ maka ntụaka ụlọọgwụ naanị, yana nchoputa ikpeazụ kwesịrị ịtụle nke ọma yana njikọ chiri anya yana ihe ngosi ụlọ ọgwụ ndị ọzọ.