West Nile Fever in USA - summary

As of October 18th, 47 states and the District of Columbia have reported 1,325 people infected with West Nile virus. Of these, 52 people have died. States reporting 50 or more cases include Arizona, California (161 cases), Colorado (133 cases), Illinois, Nebraska, North Dakota, South Dakota (144 cases) and Texas (213 cases).

Visit our Health Library for more information on exposure to and the prevention of West Nile Fever.

Advice For Travellers

The risk of exposure for the general traveller remains low. With colder weather in northern states, mosquito activity will decrease. However, since there is no vaccine or treatment for West Nile fever, travellers to areas where this virus has been found can minimize their risk of exposure by taking all necessary precautions to avoid mosquito bites.