West Nile cases are on the rise in the U.S.ATLANTA - The number of West Nile virus cases rose across the United States last year, killing 167 people, according to data released Thursday by the US Centers for Disease Control and Prevention.
There were 2,647 cases of West Nile virus last year, the CDC said, which is 550 more cases than the year before.
Still, "what the report tells us is, as in years past, West Nile virus is the most frequent cause of neuroinvasive disease."
How to protect against mosquito-borne diseaseFor those who are affected by West Nile virus, the consequences can be severe and even deadly.
West Nile is transmitted by mosquitoes, making it an arbovirus -- a type of virus transmitted by bugs.