How do you get Zika? This viral disease is caused by the Zika virus that is transmitted by Aedes mosquitoes that typically lay eggs in and near standing water in things like buckets, bowls, animal dishes, flower pots and vases. Besides standing water, rodents, birds and small mammals, may act as reservoirs. These mosquitoes are aggressive daytime biters. They can also bite at night. Reportedly they prefer to bite people, and live indoors and outdoors near people. Mosquitoes become infected when they feed on a person already infected with the virus and they then can spread the virus to other people through bites. A mother can pass the Zika virus to her unborn child (although there are no reports to date of transmission through breast milk). And there have been reports of infected males passing the Zika virus to sexual partners through infected semen. Much more information is available through the CDC Zika site.