Soundbites: How West Nile virus is transmitted

West Nile virus is transmitted to humans by mosquitos, and most people who are infected don't develop any symptoms. But, in rare cases, people can develop a serious illnesses affecting the brain, according to the Centers for Disease Control and Prevention. Justin Roby, senior fellow in immunology at the Gale Lab at UW Medicine, explains the transmission cycle as well as research that's being done at UW Medicine to see how our bodies fight against the virus.