Cases of West Nile virus are increasing in the U.S., with health officials across several states urging residents to take precautions. According to the Centers for Disease Control and Prevention, 43 states have reported West Nile virus infections this year. "The trends we are seeing in our West Nile virus tracking data are unprecedented," Colorado epidemiologist Rachel Herlihy said in a statement last month. West Nile virus is the leading cause of mosquito-borne disease in the continental U.S., according to the CDC. There are no vaccines or treatments for West Nile virus in people.

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Persons: Rachel Herlihy, “, Shawn M, LaTourette, Public Health Services Nilesh Kalyanaraman Organizations: Centers for Disease Control, New, Jersey Environmental, Maryland, Public Health Services, Health Locations: U.S, Colorado , California , Arizona , Nebraska, South Dakota, Colorado, West, Southwest, East, New Jersey, ”, Jersey, Maryland