Full Breakdown
Measles Outbreaks in Southeast Asia: A Growing Concern for Australian Travelers
3/20/2026, 5:49:47 PM
Current Measles Situation in Southeast Asia
As of early 2026, measles outbreaks are ongoing in several Southeast Asian countries, notably Indonesia, Vietnam, and Thailand. Indonesia, particularly Bali, ranks third in the U.S. Centers for Disease Control and Prevention's list of countries with significant measles outbreaks, following India and Angola. Vietnam has seen a rise in measles cases, especially among young children, while measles is endemic in Thailand, indicating that the virus is consistently present in the community. The World Health Organization has reported a surge in measles transmission in these regions since 2023.
Impact on Australia
Australia was declared measles-free in 2014; however, recent data indicates that international travel has reintroduced the virus. Between January 1, 2025, and March 7, 2026, 34 out of 60 measles infections in New South Wales were linked to overseas travel, predominantly from Southeast Asia. This trend is concerning as local transmission is becoming increasingly likely, with 18 of the 26 locally acquired infections directly linked to known imported cases.
The Nature of Measles
Measles is highly infectious, capable of spreading through airborne particles that can linger in the air for up to two hours. An infected individual can transmit the virus from four days before the rash appears until four days after. Complications from measles can be severe, including pneumonia, ear infections, and encephalitis, with fatality rates of one to three in 1,000 infections in high-income countries. To prevent ongoing transmission, approximately 95% of the population must be immune, a threshold known as "herd immunity."
Vaccination Status in Australia
Current vaccination rates in Australia show that about 94.7% of children receive their first measles vaccine dose at 12 months, but this drops to approximately 89.5% for the second dose at 18 months. This decline in vaccination coverage is a contributing factor to the recent outbreaks. Health authorities emphasize the importance of ensuring that travelers and their families are fully vaccinated before traveling to high-risk areas.
Recommendations for Travelers
Travelers to Southeast Asia are advised to check their vaccination status and ensure they are up to date with measles vaccinations. The measles vaccine is provided free under Australia’s National Immunisation Program, with additional early doses available for infants as young as six months. Adults born in 1966 or later who lack two documented doses should also consider vaccination. It is recommended to get vaccinated at least two weeks prior to departure to allow sufficient time for immunity to develop.
Conclusion
As international travel resumes, maintaining up-to-date vaccinations is crucial for protecting individuals and communities from measles outbreaks. The situation underscores the need for vigilance and proactive health measures to prevent the re-establishment of measles in Australia.
