Usually the Zika virus is spread by mosquitos. However, in a small number of cases, the virus has been spread through sexual intercourse. If your partner has travelled to a country where there is an ongoing Zika outbreak, you should use a condom for 28 days after his return home. If your sexual partner has experienced Zika symptoms or a doctor has confirmed that he has been infected with Zika, you should use a condom for six months following recovery.