Renowned Doctor Discusses Ebola: Will It Spread to Thailand? Points to Disease Severity as a Natural Barrier to Transmission
A Chulalongkorn University microbiologist says Ebola is unlikely to reach Thailand because the disease's extreme severity and high mortality rate actually restrict its spread, unlike more transmissible diseases such as influenza.
On May 19, 2025, Prof. Dr. Yong Pooworawan from the Department of Microbiology at Chulalongkorn University's Faculty of Medicine addressed concerns about Ebola reaching Thailand. He explained that it is unlikely for Ebola to spread to Thailand because the disease's extreme severity—with mortality rates between 25-90%—actually limits its transmission. Infected individuals become severely ill and rarely have the opportunity to travel long distances by air or across continents, making widespread global pandemics unlikely. Unlike diseases such as influenza or COVID-19, which can spread rapidly due to their lower severity, Ebola's virulent nature restricts its reach.
Ebola is a severe viral infection from the viral hemorrhagic fever group, caused by viruses in the genus Ebolavirus, family Filoviridae. The disease originated in wild animals in Africa and is named after the Ebola River in the Democratic Republic of Congo, where it was first identified in 1976. The largest outbreak occurred between 2013-2016 in West Africa, affecting Guinea, Liberia, and Sierra Leone, with over 30,000 cases and 11,000 deaths. The current outbreak in the Democratic Republic of Congo and Uganda involves a moderately severe strain with over 250 cases and 80 deaths, but no vaccine yet exists for this particular variant.
Transmission occurs through direct contact with infected patients or animals, particularly among African communities with traditional practices involving contact with deceased bodies. Each outbreak typically begins in rural areas linked to wildlife, with high transmission in hospitals, resulting in significant healthcare worker casualties. Symptoms include sudden high fever, fatigue, headache, muscle pain, sore throat, vomiting, diarrhea, rash, and uncontrolled bleeding internally and externally.
The World Health Organization emphasizes disease prevention through avoiding contact with patients and animal sources, alongside vaccine development for specific strains. A vaccine now exists for the Zaire strain. Thailand's distance from outbreak epicenters, combined with the disease's severity limiting transmission, means there is currently no cause for excessive concern, though public education about Ebola remains important.
