Missouri sees increase in West Nile virus cases, including two in Kansas City area that required patients to be hospitalized.

Missouri health officials urged residents Wednesday to be vigilant after seeing a “marked increase” in West Nile virus cases.

In rare cases, especially in older adults or people with weakened immune systems, West Nile virus can cause serious problems ...

Missouri health officials are warning residents to take precautions after a sharp increase in West Nile virus cases this year ...