We expect that 1-2 counties will report human cases during the week beginning September 9th. At this point, our recommendation is to ensure data quality, both of human cases and mosquito infection data. According to historical data, about 10% of cases have yet to be transmitted by this point in the year, but many of those were in the late WNV year 2012. In some years, transmission has already essentially ceased by this point. We are waiting for the first cold snap to put out mosquito populations down for the winter, and some northern counties in nearby states have already seen weather cold enough to stop their WNV cycles.
