The two types of mosquitoes that spread the Zika virus to people – the Aedes aegypti and Aedes albopictus – can be found in Kansas and Missouri, but are not that common in this area. Mosquitoes become infected when they feed on a person already infected with the Zika virus. Infected mosquitoes can then spread the virus to other people through bites. Even if they do not feel sick, travelers returning from an area with Zika should take steps to prevent mosquito bites for three weeks so they do not spread Zika to local, uninfected mosquitoes. The Zika virus usually remains in the blood of an infected person for about a week but it can be found longer in some people.