The True Story: Malaysia Sees School Clusters Rise Fast

The Sun Malaysia reported Health Minister Datuk Seri Dr Dzulkefly Ahmad's reply that in epidemiological weeks 1 to 41 of 2025 Malaysia recorded 535 flu clusters: 352 schools (65.8%), 96 kindergartens (17.9%), 35 colleges, 33 private homes, 10 workplaces and 6 care centres.

School clusters rose from 8 in week 39 to 202 in week 41, then fell to 56. The minister said the situation remained under control and asked parents to keep feverish children home, schools to promote masks and hand hygiene, and suspected outbreaks to be reported early to district health offices.

The Key Lesson: Kindergartens Are Where Clusters Form Easily

Kindergartens in Thailand have young children playing closely, sharing toys and napping in the same room.

• Clusters grow within weeks, so report and act at once
• Feverish children stay home, and parents must understand the rule
• Make handwashing routine before meals and after play
• Teachers should flag several sick children to the district health office
• Temporary closure is an option when clusters spread widely

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 Kindergartens

1. Clusters in kindergarten classes: likelihood high / impact high / level critical. Mitigation: Morning screening, isolation and classroom fogging. Owner: Principal
2. Shared toys and equipment: likelihood high / impact medium / level high. Mitigation: Disinfect toys daily. Owner: Class teacher
3. Close contact in nap rooms: likelihood high / impact medium / level high. Mitigation: Space bedding and ozone-treat nap rooms. Owner: Carers
4. Parents sending sick children: likelihood medium / impact medium / level medium. Mitigation: Collection policy and clear communication. Owner: Admin
5. Late outbreak reporting: likelihood medium / impact medium / level medium. Mitigation: Same-day reporting to the district health office. Owner: School nurse

7 Steps to Prevent Flu Clusters in Kindergartens

1. Screen children every morning for fever and symptoms
2. Have children wash hands before meals, after play and after the toilet
3. Wash and disinfect toys every evening
4. Separate feverish children and call parents
5. Notify the district health office when several children in a class are ill
6. Fog all classrooms when a cluster appears or during closure
7. Ozone-treat nap rooms and sick bays when no children are present

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: Is fogging safe in kindergarten classrooms? A: The team fogs when no children are present, and areas are typically usable about 30 minutes later.

Q: How is a nap room ozone-treated? A: No children or staff inside during treatment; ventilate before use.

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 a kindergarten 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

Malaysia shows school clusters grow very fast, so kindergartens need measures ready to use at once. Reduce the risk with the World Health Disinfection disinfection service for classrooms, activity rooms and toys, and the ozone treatment service for nap rooms and sick bays. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268