In 2025, Thailand has reported isolated cases of Zika virus, confirmed by the Department of Disease Control (DDC). As of March 2025, two laboratory-confirmed cases have been recorded — one in a local resident in Nakhon Pathom province, and another in a foreign tourist returning from southern Thailand.
This aligns with long-term trends: on average, 3 to 7 cases are detected annually nationwide, indicating low-level virus circulation and no widespread outbreak. The World Health Organization (WHO) has not classified Zika as a Public Health Emergency of International Concern since 2019, but continues to monitor it closely.
What Is the Zika Virus?
Zika is a flavivirus primarily transmitted through the bite of the Aedes aegypti mosquito — the same vector for dengue and chikungunya. Transmission can also occur sexually or from mother to fetus during pregnancy.
Most infections are asymptomatic or mild, with symptoms like fever, rash, conjunctivitis, and fatigue. However, the main risk is for pregnant women.
Why Is Zika Dangerous for Pregnant Women?
The virus can cause microcephaly and severe birth defects. During the 2015–2016 pandemic in Brazil and Latin America, thousands of such cases were documented, prompting WHO to declare a global emergency at the time.
Thailand has recorded no such cases, but the Ministry of Public Health still advises pregnant women to exercise caution when traveling to tropical regions of the country.
Where Is the Risk Higher?
The highest potential risk is in southern provinces with humid climates and high mosquito activity: Phuket, Krabi, Surat Thani, Chumphon, Pattani, and Narathiwat. However, even there, cases are sporadic and do not indicate a local outbreak.
Prevention Measures
Thailand continues active mosquito control:
- Regular insecticide fogging in tourist areas.
- Elimination of breeding sites (puddles, water containers).
- Public awareness campaigns.
Tourists are advised:
- Use repellents with DEET, Picaridin, or lemon eucalyptus oil.
- Wear light-colored, long-sleeved clothing, especially in the morning and evening.
- Choose accommodations with air conditioning and window screens.
- Pregnant travelers — consult a doctor before travel and consider postponing trips to southern areas.
Medical Care if Symptoms Appear
If you develop fever, rash, or joint pain, seek medical help. International hospitals in Phuket, Bangkok, and Pattaya offer rapid tests for Zika, dengue, and other arboviruses. Treatment is symptomatic — no specific antiviral drugs, but the prognosis is favorable with timely care.
There is no widespread Zika transmission in Thailand, and it poses no significant threat to most travelers. However, awareness and prevention remain key to a safe and comfortable stay.
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