The True Story: A Young Child with Underlying Conditions

Dimsum Daily reported on 23 October 2026 that a 3-year-old boy with underlying conditions contracted influenza A(H1) and developed an asthma exacerbation, acute necrotising encephalopathy and septic shock, and was in critical condition in the paediatric intensive care unit at Tuen Mun Hospital.

The report said he had recently returned from the US and had not received the 2026/27 flu vaccine. Dr Edwin Tsui, Controller of the Centre for Health Protection, said 26 severe paediatric cases had been recorded this season and urged parents to vaccinate children promptly.

The Key Lesson: Asthmatic Children with Flu Can Deteriorate Quickly

Thai families with asthmatic children must watch both viruses and triggers at home. Points to watch are:

• Siblings at school bringing viruses home
• Closed AC bedrooms with little airflow
• Nebulisers and masks not cleaned
• Overseas travel to places with flu outbreaks
• Children not yet vaccinated this year

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 Homes with Asthmatic Children

1. Siblings bring flu home: likelihood high / impact high / level critical. Mitigation: wash hands and change clothes after school. Owner: parents
2. Child not vaccinated: likelihood high / impact high / level critical. Mitigation: ask a doctor about yearly vaccination before travel. Owner: parents
3. Nebuliser kit not cleaned: likelihood medium / impact medium / level medium. Mitigation: clean per manufacturer instructions. Owner: parents
4. Stuffy bedrooms: likelihood high / impact medium / level high. Mitigation: open windows daily. Owner: parents
5. Home not disinfected after illness: likelihood medium / impact high / level high. Mitigation: fog and ozone-treat the home once everyone recovers. Owner: parents

Ways to Reduce Flu Risk in Homes with Asthmatic Children

1. Ask a doctor about yearly vaccination
2. Vaccinate before overseas travel
3. Wash hands after coming home
4. Separate rooms for sick family members
5. Clean nebuliser kit per instructions
6. See a doctor at once if the child is breathless, drowsy or has a seizure
7. Fog and ozone-treat the home after recovery

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: What complications did the Hong Kong boy have? A: Asthma exacerbation, acute necrotising encephalopathy and septic shock, per the 23 October 2026 report.

Q: Was the child vaccinated? A: He had not received the 2026/27 flu vaccine and had just returned from the US.

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 individuals get a tax invoice or receipt? 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 Hong Kong shows children with underlying conditions can become seriously ill fast. Clean homes and alert parents protect children best. Reduce the risk with the World Health Disinfection disinfection service for homes and condominiums, and the ozone treatment service for children's bedrooms and living rooms. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268