Cases of West Nile virus are up nearly 45 % in several more weeks . Officials say they expect cases to rise for the past week . Fast facts on West Nile virus . There have been 66 deaths from the mosquito-borne virus .
Cases of West Nile virus are up nearly 45 % in several more weeks . Officials say they expect cases to rise for the past week . There have been 66 deaths from the mosquito-borne virus .