There is currently no vaccine or drug available to prevent Zika virus infection. The majority of Zika virus cases are acquired via a mosquito bite, although sexual transmission of Zika virus infection can occur. Zika virus infection in women who are pregnant or planning to get pregnant can result in serious birth defects. 

This Guidelines summary includes:

• A revised algorithm for the assessment of pregnant women with a history of travel to an area at risk
• Travel advice
• Advice for pregnant women and couples considering pregnancy returning from a country or area with risk for Zika virus transmission.