Why is it virtually impossible to stamp out a disease caused by a zoonotic virus?
A.You'd have to drive the vector organism extinct to do so.
B.Many vector organisms have multiple stages of their life cycle that can carry a zoonotic virus, which complicates controlling the vector-borne transmission.
C.Many viruses transmitted in this manner may utilize more than one vector organism.
D.Many zoonotic viruses may be able to reside in more than 1 host organism, complicating control measures.
E.All of the above are correct.