The True Story: Vietnam Tightens Measures Against Respiratory Illness

SGGP reported on 29 November 2025 that Vietnam had recorded over 132,000 seasonal flu cases and three deaths since the start of 2025, mainly H1N1, H3N2 and influenza B. At the National Children's Hospital, influenza A cases rose from about 400 in September to 3,500 in October.

The health ministry told provincial health departments to coordinate with education, industry and trade sectors and industrial park authorities to curb spread in schools, factories and crowded commercial centres, and urged people to wash hands, keep environments clean and get vaccinated.

The Key Lesson: Factories Keep Many People Together All Day

Factories in Thai industrial estates have hundreds to thousands of shift workers sharing canteens, locker rooms and shuttle buses.

• Mass sick leave hits production lines, so prevent it first
• Canteens and shuttle buses are where workers are closest
• Fingerprint scanners and water dispensers are touched by everyone
• Workers' children fall ill first and bring germs home and to work
• Coordinate with the estate and provincial health office, as Vietnam did

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 Factories in Industrial Estates

1. Mass sick leave halting production: likelihood medium / impact high / level high. Mitigation: Gate screening, clear sick leave and common-area fogging. Owner: Plant manager
2. Crowded canteens at breaks: likelihood high / impact medium / level high. Mitigation: Staggered breaks and table wiping each round. Owner: Welfare
3. Closed staff shuttle buses: likelihood high / impact medium / level high. Mitigation: Daily ozone treatment and ventilation. Owner: Admin
4. Fingerprint scanners and water dispensers: likelihood high / impact low / level medium. Mitigation: Hourly wiping at shift start. Owner: Housekeeping
5. Sick bay overwhelmed: likelihood medium / impact medium / level medium. Mitigation: Ozone-treat the sick bay and plan referrals. Owner: Factory nurse

7 Steps to Prevent Flu in Factories

1. Check temperatures at the gate every shift
2. Announce a sick-leave policy so workers do not push through illness
3. Stagger canteen breaks and wipe tables each round
4. Wipe fingerprint scanners and water dispensers hourly at shift start
5. Fog canteens, lockers and offices on days off or between shifts
6. Ozone-treat shuttle buses and the sick bay when empty
7. Hold an on-site vaccine day with the partner hospital

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: Can a large factory be fogged without stopping production? A: Yes. The team fogs common areas between shifts or on days off; areas are typically usable about 30 minutes later.

Q: Can shuttle buses be ozone-treated daily? A: Yes, when empty, with ventilation before workers board.

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 factory 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

Vietnam put factories and industrial parks at the centre of its flu response, and factories in Thailand should prepare too. Reduce the risk with the World Health Disinfection disinfection service for canteens, locker rooms and offices, and the ozone treatment service for staff shuttle buses and sick bays. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268