Health authorities in South Korea have issued an early influenza epidemic advisory for the 2026-27 season following a sharp increase in cases, prompting discussions on vaccination timing and public health measures amidst ongoing concerns about the upcoming flu season.
South Korea’s disease authorities have issued an influenza epidemic advisory for the 2026-27 season unusually early, after a sharp rise in cases at the start of September. The Korea Disease Control and Prevention Agency said the consultation rate for flu-like illness reached 25.3 per 1,000 outpatient visits in the week of August 30 to September 5, well above the epidemic threshold of 12.9, with A(H1N1)pdm09 the dominant strain in circulation. Children aged one to 12 and infants have been among the most affected groups, and hospital admissions have also increased, according to the agency.
The early warning has prompted fresh debate over whether people should move up their vaccination dates. But doctors at On Hospital in Busan say the answer depends on age, health status and whether a person belongs to a national vaccination group, rather than on the calendar alone. Influenza vaccines do not provide immediate protection; it takes time for antibodies to build, so timing matters. For healthy adults, the hospital says it is not always necessary to rush into a September appointment simply because transmission has started earlier than usual.
This season’s government vaccination programme is already set. Free shots for children aged six months to 14 years will begin on September 21, with those who need two doses in a season, along with pregnant women, first in line. Children who need only one dose because of prior vaccination history can start on September 28. The free programme for older adults will be rolled out by age group from October 12 for those aged 75 and above, October 15 for those aged 70 to 74, and October 19 for people aged 65 to 69. All of these groups can receive free vaccination until April 30, 2027.
Health officials are also urging people not to ignore respiratory symptoms. The KDCA has told the public to wear masks, cover coughs and follow basic hygiene measures, while high-risk people with fever or breathing symptoms are advised to seek medical care early. On Hospital’s internal medicine chief, Yoo Hong, said influenza can vary widely in severity depending on a person’s condition, and that the priority is to schedule vaccination appropriately and get prompt treatment if warning signs appear. For those with egg allergies, the choice of vaccine may also require medical advice, as some facilities carry cell-culture vaccines that may be an option in certain cases.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
