Human cases of West Nile Fever begin in USA

For weeks, many counties and states in the USA have been recovering West Nile Fever virus from trapped mosquitoes. Now, infections with this virus are beginning to appear in people as the transmission season progresses. So far, 19 states have reported sporadic cases of this illness. The most affected states include Texas (22 cases), Arizona (18 cases) and South Dakota (14 cases). No deaths have been reported.

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

Advice For Travellers

While the risk of exposure for the general traveller is low throughout the USA, travellers should be aware that cases occur in nearly every state during the late summer season. The risk will vary from place to place, and since there is no vaccine or treatment for West Nile Fever, travellers to areas where this virus has been found can reduce their risk of exposure by taking all necessary precautions to avoid mosquito bites.