South Korea is experiencing its highest number of measles cases in six years, with 52 confirmed infections reported so far in 2025, surpassing the total of 49 cases recorded in 2024. This surge is part of a broader pattern of outbreaks across Southeast Asia, raising concerns among health authorities about the potential for further spread.
Imported Cases Fueling the Surge
The Korea Disease Control and Prevention Agency (KDCA) attributes the increase primarily to imported cases. Of the 52 reported infections, 34 were contracted abroad, with Vietnam identified as the most common source. The remaining 18 cases resulted from local transmission within households and medical facilities.
South Korea was declared measles-free by the World Health Organization (WHO) in 2014 and maintains high childhood vaccination coverage. However, the recent rise in cases underscores the challenges posed by international travel and the importance of vigilance in disease surveillance.
Regional Outbreaks Escalate
Neighboring countries are also grappling with significant measles outbreaks. Vietnam has reported approximately 40,000 suspected cases and five deaths in 2025, a substantial increase from the 6,725 cases and 13 deaths recorded in 2024. Thailand reported 7,507 cases in 2024, up from just 38 in 2023.
These outbreaks have had ripple effects beyond the region. Australia, for instance, has seen a resurgence of measles cases linked to travelers returning from Southeast Asia. Health authorities have issued warnings and emphasized the importance of vaccination, particularly for those planning international travel.
Health Authorities Urge Vigilance
In response to the uptick in cases, the KDCA has urged travelers returning from countries with active measles outbreaks to remain vigilant for symptoms and to ensure their vaccinations are up to date. While the risk of a widespread outbreak in South Korea remains low due to robust immunization and surveillance systems, health officials stress the importance of continued monitoring and public awareness.
The situation highlights the interconnectedness of global health and the need for coordinated efforts to prevent the spread of infectious diseases. As measles remains one of the most contagious human diseases, maintaining high vaccination coverage and prompt response to outbreaks are crucial in safeguarding public health.
