Cases of West Nile Fever increasing slowly in USA

Sporadic cases of West Nile fever are being reported by 20 states, but the number of total cases is small. However, there has been 1 death among the 38 reported cases. Arizona and Oklahoma have both reported a total of 5 cases, the largest number of any state.

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

Advice For Travellers

While the number of cases of West Nile fever is low, the proportion of states reporting at least 1 case is relatively high, indicating that infected mosquitoes may be widespread. While the risk for the general traveller is still low, travellers should still follow recommendations to prevent mosquito bites.