MOSQUITOES CAUSE MORE DEATH & DISEASE THAN ANY OTHER ANIMAL ON THE PLANET Yesterday was World Mosquito Day. The mosquito is the world’s deadliest animal, and CDC is fighting mosquito-borne diseases worldwide. Mosquitoes cause more death and disease than any other animal on the planet. Malaria, Dengue Fever, Yellow Fever, Japanese Encephalitis, West Nile Virus, Chikungunya Fever, Kunjin Virus, Jamestown Canyon Virus, Venezuelan Equine Encephalitis, St. Louis Encephalitis, Pogosta Disease, Ross River Virus, Lymphatic Filariasis, Eastern Equine Encephalitis, Murray Valley Encephalitis, Rift Valley Fever, La Crosse Encephalitis. mosquitoes_infographic_lg