West Nile Virus: the RHA’s
(Click on the map for a full-sized version, or on the link above for a more detailed pdf.)
A Regional Health Authority in Manitoba is a division of the province, related to population, that is responsible for administering health care to its residents. For the purposes of this map, I have included only the RHA’s that are involved in the care of those residents that were subjected to above-average West Nile Virus exposure in 2007 (based on fictitious data, as we’ve talked about). Mosquito trap counts and confirmed cases of West Nile Virus are documented by RHA; you can look at the most current reports online at http://www.manitoba.ca/health/wnv/
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Birds carry West Nile virus. It was almost certainly a bird that brought the virus to New York in the summer of 1999, but no one knows for sure exactly how it happened. The bird may have been ill, or it may have been relatively healthy: some birds die from the infection while others are unaffected. In any case the bird was bitten by a mosquito while the virus was circulating in its bloodstream.^
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