The True Story: The Summer Flu Season Arrives

news.gov.hk reported on 2 July 2026 that the Centre for Health Protection declared Hong Kong had entered its summer flu season, with 46 outbreaks, about 70% in schools and about 20% in residential care homes for the elderly.

Strain data showed H3 at 59%, H1 at 23% and influenza B at 18%. Authorities urged vaccination, hand hygiene, and keeping sick children home from school.

The Key Lesson: Children Living Together for Days Spread Flu Faster Than Classrooms

Thai scout, language and sports camps bring children from many schools together. Points to watch are:

• Tents or dormitories with sleepers close together
• Shared bathrooms used all at once
• Dining halls with shared cups
• Group activities with close contact
• Parents sending sick children because they have paid

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 and Holiday Camps

1. Sick children attend camp: likelihood medium / impact high / level high. Mitigation: screen on day one and offer refunds or rescheduling. Owner: camp director
2. Dormitory sleepers close together: likelihood high / impact medium / level high. Mitigation: space sleeping spots and sleep head-to-toe. Owner: camp counsellor
3. Shared cups: likelihood high / impact medium / level high. Mitigation: children bring personal bottles. Owner: catering team
4. No sick room: likelihood medium / impact high / level high. Mitigation: set up a separate sick bay with a carer. Owner: camp director
5. Accommodation not disinfected between groups: likelihood medium / impact high / level high. Mitigation: fog and ozone-treat before the next group. Owner: venue owner

Ways to Reduce Flu Risk at Children's Camps

1. Screen for fever on opening day
2. Offer rescheduling for sick children
3. Set up a sick bay with a carer
4. Have children use personal bottles
5. Wash hands before every meal
6. Space sleeping spots in dormitories
7. Fog and ozone-treat accommodation between groups

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: How many outbreaks did Hong Kong report? A: 46, about 70% in schools and about 20% in elderly homes, per the 2 July 2026 announcement.

Q: Which strain was most common in Hong Kong? A: H3 at 59%, H1 at 23% and influenza B at 18%.

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 camp organisers 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 Hong Kong shows flu spreads most among children. Well-prepared camps send children home with good memories, not fevers. Reduce the risk with the World Health Disinfection disinfection service for dormitories, meeting halls and dining halls, and the ozone treatment service for camp bedrooms and sick bays between groups. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268