With some areas of the country having excess rainfall, and many parts moving into prime West Nile virus season, many government officials are warning humans to take precautions against the deadly disease.

West Nile virus cases in humans have been reported already this season in Colorado, North Dakota, California, Iowa, Mississippi, and South Dakota. As of June 12, avian, animal, or mosquito WNV infections were reported to the Centers for Disease Control ArboNET from the following states in 2007: California, Florida, Idaho, Illinois, Indiana, Mississippi, Tennessee, Texas, and Virginia.

An Associated Press article on June 28 noted that last year, 345 people contracted West Nile virus in Colorado, including at least seven who died.

North Dakota first started seeing human cases in 2002, and according to an AP article on June 26, in 2003 the state experienced 617 human cases and five deaths. Last year there were 137 confirmed cases in North Dakota and one death