The True Story: Primary-Age Children Hit Hardest

Korean health news site Medipharm Health reported that on 11 September 2026 the Korea Disease Control and Prevention Agency (KDCA) issued an influenza advisory after influenza-like illness reached 25.3 per 1,000 outpatient visits, against an epidemic threshold of 12.9.

The report said ages 7–12 had the highest rate at 75.1. Lim Seung-gwan, KDCA Commissioner, urged children, older people and at-risk groups to get vaccinated and follow cough etiquette.

The Key Lesson: After-School Classes Bring Children from Many Schools Together

Thai art, music and tutoring schools gather children from many schools in small rooms. Points to watch are:

• School instruments blown or held in turn
• Paints and brushes shared
• Small classrooms with AC on all day
• Children from many schools bringing viruses together
• Parents waiting in cramped lounges

How Flu Spreads

According to the World Health Organization, seasonal influenza spreads easily where people gather, such as schools and nursing homes. It spreads through droplets when people cough or sneeze, and through hands that touch contaminated surfaces and then the eyes, nose or mouth. Most people recover within a week, but young children, older adults, pregnant women and people with chronic illness are at risk of severe disease. Influenza is an enveloped virus, which suitable disinfectants can inactivate.

Risk Register for Children's Art and Music Schools

1. Wind instruments shared: likelihood high / impact high / level critical. Mitigation: personal mouthpieces and cleaning after use. Owner: music teacher
2. Art supplies shared: likelihood high / impact medium / level high. Mitigation: separate kits per child. Owner: art teacher
3. Small rooms shut all day: likelihood high / impact medium / level high. Mitigation: air rooms between lessons. Owner: branch manager
4. Sick children attend to not waste the course: likelihood medium / impact high / level high. Mitigation: offer make-up lessons. Owner: branch manager
5. Classrooms not disinfected: likelihood medium / impact medium / level medium. Mitigation: fog and ozone-treat classrooms after hours. Owner: school owner

Ways to Reduce Flu Risk in Art and Music Schools

1. Give children personal mouthpieces and kits
2. Clean instruments after each lesson
3. Offer make-up lessons for sick children
4. Screen for fever before class
5. Air rooms between lessons
6. Keep parent waiting areas open and airy
7. Fog and ozone-treat classrooms after hours

How ULV Disinfection Fogging Helps

The World Health Disinfection disinfection service uses ULV fogging machines that turn the disinfectant into a fine mist. It settles across the whole area, including corners, curtains, upholstery and surfaces that hand wiping cannot reach.

• Whole-area coverage without relying on wiping spot by spot
• Quick return to use, typically about 30 minutes after fogging
• Uses Chemgene HLD4H, which meets EN 14476 for virucidal activity according to the product page
• The team wears full protective equipment, so owners and staff do not take the risk themselves
• Report and photos after the job for customers, management or authorities
• Tax invoice with 3% withholding tax for companies and agencies

Ozone Treatment for Closed Rooms and Stuffy Spaces

The World Health Disinfection ozone treatment service uses machines that generate ozone gas from oxygen in the air. It suits closed rooms such as meeting rooms, bedrooms, classrooms, sick bays and vans, helping reduce germs in the air and on surfaces and removing stale odours. Ozone breaks back down into oxygen after treatment, leaving no residue.

• Works alongside disinfection fogging: spray or wipe surfaces first, then use ozone for the air and corners of closed rooms
• No people or pets in the room during treatment: the team seals the room and runs a timer
• Ventilate after treatment before normal use resumes
• Machines tested by Intertek, according to WHD's service page
• Ideal after someone has been ill, such as recovered patients' rooms, shared bedrooms and shuttle vans

Before and After

Frequently Asked Questions

Q: When did South Korea issue its flu advisory? A: 11 September 2026, when ILI reached 25.3 per 1,000 against a 12.9 threshold.

Q: Which children were hit hardest in Korea? A: Ages 7–12, at 75.1 per 1,000 visits.

Q: Does the fogging disinfectant work on flu? A: The team uses Chemgene HLD4H, which meets EN 14476 for virucidal activity according to the product page, and influenza is an enveloped virus that suitable disinfectants can inactivate. Fogging does not replace vaccination or handwashing.

Q: Can I enter the room right after ozone treatment? A: No one should be in the room during treatment. Ventilate afterwards before normal use; the team will advise the right time for the room size.

Q: Can private schools get a tax invoice? A: Yes. Tax invoices are issued and 3% withholding tax is supported. Call 065-556-6294 or LINE @whd268.

Related Links and Sources

• World Health Disinfection disinfection service
• World Health Disinfection ozone treatment service
• Chemgene HLD4H disinfectant and price
• Influenza information from Thailand's Department of Disease Control, hotline 1422
• WHO seasonal influenza fact sheet

Prevent Flu with Disinfection Fogging and Ozone Treatment

The real news from Korea shows primary-age children are hit hardest. Clean after-school classes are where parents trust sending their children. Reduce the risk with the World Health Disinfection disinfection service for classrooms, practice rooms and parent lounges, and the ozone treatment service for small classrooms and music practice rooms. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268