Zika virus Overview Zika virus disease is caused by the Zika virus, which is spread to people primarily through the bite of an infected mosquito (
Aedes aegypti and
Aedes albopictus). The illness is usually mild with symptoms lasting up to a week, and many people do not have symptoms or will have only mild symptoms.
Zika & Sexual Transmission Basics of Zika Virus and Sex transmission. Zika can be passed through sex from a person who has Zika to his or her sex partners. Sex includes vaginal, anal, oral sex, and the sharing of sex toys.