Prevention of Sexual Transmission of Zika Virus: Interim Guidance Update

This document is an update of guidance published on 7 June 2016 to provide advice on the prevention of sexual transmission of Zika virus.

The primary transmission route of Zika virus is via the Aedes mosquito. However, mounting evidence has shown that sexual transmission of Zika virus is possible and more common than previously assumed.1 This is of concern due to an association between Zika virus infection and adverse pregnancy and fetal outcomes, including microcephaly, neurological complications and Guillain-Barré syndrome.