Thailand began enforcing mandatory 21-day quarantine for all travelers arriving from the Democratic Republic of Congo and Uganda on Wednesday, becoming the first country in the world to impose restrictions of that severity in response to a fast-moving Ebola outbreak that has no approved vaccine or treatment.
The measures took effect at 6 p.m. local time on May 27, following a decision by the National Communicable Disease Committee the day before. All travelers originating from or transiting through the two countries must now enter Thailand exclusively through Suvarnabhumi Airport, where they will be channeled directly to the Bamrasnaradura Infectious Disease Institute on the outskirts of Bangkok. Those showing no symptoms will be held there for a full three weeks. Anyone arriving with fever or other signs consistent with Ebola will be transferred immediately to a designated state hospital for isolation and treatment for at least the same period.
The Thai government will cover the cost of quarantine for the first 72 hours. After that, travelers are responsible for their own expenses, though Thai nationals are exempt from charges. Violations of the quarantine order can result in fines of up to 100,000 baht, up to one year in prison, or both, according to several news sources.
The trigger for the escalation was twofold: a sudden spike in arrivals from the two affected countries, and a growing compliance problem with the previous system. Under the earlier protocol, travelers were required to self-monitor and report their whereabouts daily for 21 days. Officials found that some individuals had checked into multiple hotels after arrival and were difficult to track. Daily arrivals from Congo and Uganda had also climbed from a typical five to seven passengers to more than ten in recent days, with 19 recorded on a single day, according to the Ministry of Public Health. Thailand has no direct flights from either country, meaning all arrivals come through connecting routes. Roughly 100 travelers from both nations had entered Thailand in the weeks before the quarantine was enforced.
The outbreak at the center of Thailand’s concern is driven by the Bundibugyo strain of the Ebola virus — a rare variant with no licensed vaccine and no approved treatment. It’s distinct from the Zaire strain that drove the 2014–2016 West Africa epidemic, for which two vaccines now exist. Existing Ebola vaccines do not work against Bundibugyo, and scientists are still assessing whether any of them could offer partial protection. The strain has a case fatality rate of between 30 and 50 percent, according to the WHO.
The WHO declared the outbreak a public health emergency of international concern on May 17 — the highest-level global health alert. The first known case was a healthcare worker in northeastern DRC who became ill in late April. The virus spread quickly through Ituri Province and eventually crossed into Uganda via travelers to Kampala. As of May 26, the DRC had recorded more than 1,000 suspected cases and 121 confirmed cases across three provinces, along with 238 deaths among suspected cases and 17 among confirmed cases. Uganda has reported seven confirmed cases and one confirmed death.
Thailand has recorded zero domestic Ebola infections. The country’s decision to move to mandatory quarantine, rather than self-monitoring, reflects the difficulty of tracking a disease with an incubation period of up to 21 days in a country that processes millions of international arrivals each year. Suvarnabhumi Airport alone serves more than 113 airlines and was handling tens of millions of passengers annually before the current restriction came into force.
Several other countries are moving in a similar direction, though none had imposed a quarantine of this scope as of Wednesday. Canada announced it would begin its own 21-day quarantine requirement starting May 30 for travelers from Congo, Uganda, and South Sudan — and went a step further by suspending previously approved immigration documents for residents of those countries for 90 days. The Bahamas also announced Ebola-related travel restrictions. India began screening arrivals from the affected countries at major airports.
For Thailand, a country that relies heavily on tourism and serves as one of Southeast Asia’s busiest transit hubs, the decision represents a significant departure from the more cautious approach adopted earlier this month. The government frames it as a necessary step to protect public health while the outbreak continues to worsen and international containment efforts remain complicated by active conflict in eastern DRC, which has made contact tracing extremely difficult.
