The US Centers for Disease Control and Prevention (CDC) has issued a Level 2 travel alert for Zika in Bali, Indonesia, following reports of infections among returning travellers. The CDC has not published an exact case count. The following countries have reported travel-associated Zika cases among travellers returning from Indonesia in 2026:
- France: 4 cases detected from January to March 2026. These formed part of 11 cases identified between July 2025 and March 2026, mostly following travel to Bali and neighbouring islands, ECDC
- United Kingdom: 4 cases between January and June 2026. Indonesia was the most frequently reported country of exposure among the UK’s eight imported Zika cases, UKHSA
- New Zealand: 1 case reported during surveillance week 30, following travel to Indonesia.
- US: no case number provided, LINK.
- China: 1 case in a returning traveler after a stay in Jakarta in February 2026, PCR confirmed, LINK.
Travelling in pregnancy poses an increased risk for the mother and the baby for mosquito-transmitted diseases. Please refer to the pregnancy factsheet.
Prevention:
- Always protect yourself from mosquito bites during the day and early evening, see factsheet mosquito-bite prevention.
- If traveling in an area with increased risk of Zika transmission – as it is in Indonesia:
- If you are pregnant: women at any stage of pregnancy should reconsider their travel plans. If travel is essential, consult a travel medicine specialist before departure.
- If your partner is pregnant: use condoms throughout pregnancy to prevent possible sexual transmission of Zika.
- If you or your partner is planning to become pregnant:
- Use condoms throughout your trip and for at least two months after returning home to prevent possible sexual transmission of Zika without symptoms.
- You should wait at least 2 months after returning from an area with an increased risk of Zika transmission before getting pregnant.
- Use condoms throughout your trip and for at least two months after returning home to prevent possible sexual transmission of Zika without symptoms.
- If you are pregnant: women at any stage of pregnancy should reconsider their travel plans. If travel is essential, consult a travel medicine specialist before departure.