The True Story: All of France at Epidemic Level

The Connexion reported on 11 January 2026 that Santé publique France said flu was at epidemic level in every mainland region, hospital visits were high especially among people 65 and over, and flu accounted for 6.3% of deaths in early January.

The epidemic peaked in late December 2025, with A(H1N1)pdm09 and A(H3N2) circulating. Authorities recommended vaccination, handwashing, ventilation and wearing a mask when symptomatic.

The Key Lesson: The First Day Back Is a Risk Day

Thai offices return to work together after New Year and Songkran. The lessons are:

• People return from many places in the same week
• Closed air-conditioned meeting rooms help germs spread
• Staff with symptoms should work from home where possible
• Ventilation and masks remain recommended measures
• Cleaning before reopening beats waiting for illness

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 Offices

1. Staff returning from holidays together: likelihood high / impact medium / level high. Mitigation: Clean before reopening and screen symptoms. Owner: HR
2. Closed air-conditioned meeting rooms: likelihood high / impact medium / level high. Mitigation: Ventilate and wipe tables after meetings. Owner: Facilities
3. Many staff ill at once: likelihood medium / impact high / level high. Mitigation: Work-from-home and backup plans. Owner: Department heads
4. Shared touch points such as lifts and copiers: likelihood high / impact medium / level high. Mitigation: Wipe several times a day. Owner: Housekeeping
5. Older staff at higher risk: likelihood low / impact high / level medium. Mitigation: Encourage vaccination and flexible work. Owner: HR

7 Steps to Prepare an Office After a Long Holiday

1. ULV-fog before reopening; areas are usable about 30 minutes later
2. Ask staff to check for symptoms before returning
3. Let staff with symptoms work from home where the job allows
4. Place masks and hand gel on every floor
5. Wipe lift buttons, handles and copiers several times a day
6. Ozone-treat meeting rooms out of hours with nobody inside, then ventilate
7. Encourage flu vaccination, especially for risk 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: Why fog before reopening? A: So the space is clean before everyone returns. Areas are typically usable about 30 minutes after ULV fogging.

Q: Is ozone treatment of meeting rooms safe? A: Ozone is generated from oxygen. No people or pets may be inside during treatment, and the room must be ventilated 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 companies get a tax invoice with 3% withholding? 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

France shows that the weeks after the holidays are when flu hits hardest. Offices that prepare early keep their teams working. Reduce the risk with the World Health Disinfection disinfection service for work areas, meeting rooms and lifts, and the ozone treatment service for meeting rooms and executive offices. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268