News Zika Virus Information From The Centers For Disease Control & Prevention The CDC provides up-to-date information on symptoms, diagnosis, treatment, and prevention of the Zika Virus. First Massachusetts Mosquitoes Test Positive For West Nile Virus In 2015 Mosquitoes infected with West Nile virus detected in Massachusetts for the first time this year on July 8th, according to the Department of Public Health West Nile Virus Detected In Mosquitoes In Maryland Officials with the Maryland Department of Health and Mental Hygiene confirm West Nile was found in mosquitoes in Maryland on August 5th. Doctors In The U.S. On High Alert For Chikungunya Virus If you’ve spent any time outside this summer, it’s likely you’ve fought off plenty of mosquitoes. But now there’s even more reason to swat them away due to a new virus carried by the pests that’s spreading quickly, CBS 2’s Dick Brennan reported.