Which One of the Following Statements About West Nile Virus

Multiple Choice

Which one of the following statements about West Nile virus is FALSE?

A) The disease is maintained in a horse-human-horse cycle.
B) The disease is maintained in a bird-mosquito-bird cycle.
C) Most human cases are subclinical or mild.
D) The disease caused by the virus can sometimes cause a fatal encephalitis.
E) The virus was introduced to the United States in 1999 in the New York City area.