The True Story: The World's First Human H5N5 Case

Dawn and Good Morning America (ABC News) reported that Washington State confirmed the world's first human case of H5N5 bird flu. The patient was an older adult with underlying conditions who kept a backyard flock and died in November 2025.

Dr Scott Lindquist, a Washington State health official, said the risk to the public remained low and no person-to-person spread was found. Officials believed the patient was exposed through the backyard flock or wild birds.

The Key Lesson: Backyard Chickens Are Closer to Older People Than It Seems

Many Thai homes keep backyard chickens or fighting cocks near living areas, often cared for by older relatives. Points to watch are:

• Older people with conditions feeding the chickens
• Chickens mixing with wild birds at feeders
• Fighting cocks held close every day
• Chickens dying without reporting
• Coops next to the house dust entering rooms

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 Backyard Chicken and Fighting Cock Owners

1. Older people with conditions care for chickens: likelihood high / impact high / level critical. Mitigation: have other members take over or wear mask and gloves. Owner: family
2. Wild birds eat chicken feed: likelihood high / impact medium / level high. Mitigation: cover feeders and water. Owner: chicken owner
3. Fighting cocks held near the face: likelihood high / impact medium / level high. Mitigation: wash hands every time, avoid face contact. Owner: fighting cock owner
4. Unusual deaths not reported: likelihood medium / impact high / level high. Mitigation: report to livestock officers, never handle carcasses bare-handed. Owner: chicken owner
5. House next to coop not disinfected: likelihood medium / impact medium / level medium. Mitigation: clean the coop and fog the house. Owner: family

Ways to Reduce Bird Flu Risk for Backyard Chicken Owners

1. Have older people limit direct contact
2. Cover feeders from wild birds
3. Wash hands with soap after handling chickens
4. Report to livestock officers when chickens die unusually
5. Keep separate shoes for the coop
6. See a doctor if fever follows contact with sick birds
7. Fog and ozone-treat homes next to coops

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: Where was the first human H5N5 case found? A: Washington State, USA, in November 2025. The patient was an older adult with conditions who kept backyard poultry.

Q: Does H5N5 spread between people? A: Washington officials found no person-to-person spread and said public risk remained low.

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 farms or households 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 the US shows backyard chickens can bring animal viruses to people, especially older people with conditions. Simple prevention protects the people we love. Reduce the risk with the World Health Disinfection disinfection service for homes next to chicken coops, and the ozone treatment service for older people's bedrooms and living rooms. To book, call 065-556-6294 or LINE @whd268.

Call 065-556-6294 | LINE: @whd268