To Eradicate a Virus Like West Nile Virus, One Would

Multiple Choice

To eradicate a virus like West Nile virus, one would need to control the populations of its mosquito vectors. Why?

A) because the virus is spread from person to person by mosquitoes
B) because mosquitoes spread the virus from people to birds, and the birds then disperse the virus quite widely
C) because mosquitoes can transmit the virus from birds to people
D) because mosquito saliva makes the symptoms of the virus worse