The Chao Phraya spills into Ang Thong, and families crowd together

According to a Thai Post report, the Chao Phraya River at Ang Thong rose to 8.65 metres, above the 8-metre critical level, affecting 1,523 households across five districts: Mueang Ang Thong, Pa Mok, Wiset Chai Chan, Chaiyo and Samko, covering 31 sub-districts and 125 villages. Water released from the Chao Phraya Dam at about 2,500 cubic metres per second took roughly 17 to 18 hours to reach Ang Thong, while soldiers and villagers reinforced sandbag lines along the riverbank.

Numbers describe flooded houses. They do not describe how daily life changes for families with small children. Some moved upstairs, some went to stay with relatives on higher ground, and some spent nights in temporary shelters. Children slept side by side in one room and shared toys, cups and blankets, while the rain kept falling and the air stayed damp.

A typical scenario

The following is an example case, not the story of a real person.

Prae has a five-month-old daughter and a three-year-old son. When the ground floor of their riverside house in Pa Mok flooded, the family moved to an aunt's house on higher ground, where four more children from other relatives were already staying. Everyone slept in the living room with the windows shut against the rain.

A few days later an older cousin developed a runny nose and cough that looked like a normal cold. Prae's son caught it next, and finally her baby had a runny nose, a frequent cough and began feeding less. One night Prae noticed the baby breathing fast, with the skin between her ribs pulling in on each breath, and rushed her to hospital. The doctor found a respiratory viral infection consistent with RSV that needed close monitoring.

Back home after the water went down, Prae wondered how to prepare a house still full of mud, musty smells and toys handled by many children. The answer lay in washing, drying, handwashing and disinfecting surfaces, in that order.

What is RSV, and why are young children at greater risk?

RSV is a virus that infects the respiratory tract. In most adults and older children it behaves like a cold: runny nose, cough and sore throat, clearing up within a week or two. In babies and toddlers, however, the virus can reach the small airways and lungs, causing bronchiolitis and pneumonia, which can make breathing hard and may require a hospital stay.

According to the CDC, almost all children catch RSV at least once before age two, and people can be reinfected throughout life because immunity after infection does not last. Symptoms usually start about four to six days after exposure. Infected people are typically contagious for three to eight days, but babies and people with weakened immune systems can spread the virus for longer, even after symptoms fade.

In Thailand, the Department of Disease Control warns each year that RSV tends to rise during the rainy season and into early cool season, the same months when central provinces are most likely to flood. The two risks arrive together.

How RSV spreads, and where floods come in

Let us be clear: RSV does not spread through floodwater. It is not carried in the water like bacteria from sewage. It spreads through the respiratory route and contact:

• Droplets from coughs and sneezes landing in the eyes, nose or mouth of people nearby.
• Direct contact, such as kissing the face of a sick child.
• Contaminated surfaces, then touching the eyes, nose or mouth. The CDC notes that RSV can survive for many hours on hard surfaces such as tables and crib rails, and for a shorter time on soft surfaces like tissues and hands.

Floods matter indirectly, but strongly:

1. Crowding

When several families share one house or shelter, many children sleep, eat and play close together all day, and respiratory viruses pass quickly.

2. Too little clean water for handwashing

Tap water may stop or turn muddy and bathrooms may be unusable, so washing hands before holding a baby or making a bottle becomes inconsistent.

3. Shared belongings

Toys, bottles, spoons, blankets and pillows move between children, and each becomes a surface that can carry the virus.

4. Closed, humid rooms

Heavy rain means shut windows, little fresh air and high humidity. Cooking or burning mosquito coils indoors adds smoke that irritates small airways.

5. Tired bodies

Exhaustion, poor sleep and limited food leave children and adults less able to fight infection.

6. Childcare centres and schools reopening

When child development centres and kindergartens reopen, children from many villages come together. If the building has not been cleaned and disinfected thoroughly, shared surfaces become a risk point.

Shared touch points at home and in childcare centres

Because RSV can last hours on hard surfaces, knowing where little hands go most helps you clean the right places:

• Crib rails, cot sides and baby rockers, which children grip and sometimes chew.
• Plastic toys, building blocks and board books.
• Dining tables, high chairs and food trays.
• Door handles, light switches, remote controls and phones that adults touch before picking up a child.
• Changing tables and baby bathtubs.
• Stair rails and door frames in centres and schools.
• Play-area floors where children crawl and sit.
• Taps, sinks and soap pumps that everyone touches before washing.

Wash fabric toys, blankets and pillowcases with detergent and dry them completely. Wash washable plastic toys in soapy water and let them dry before any surface disinfection, following the disinfectant maker's instructions.

RSV symptoms in young children, and danger signs that need hospital care now

Common symptoms

• Runny or blocked nose
• Cough, which may worsen around days three to five
• Fever, though some children have none
• Sneezing, poor appetite, irritability
• Wheezing

In very young babies the first signs may simply be irritability, poor feeding, drowsiness or short pauses in breathing, even without fever.

Danger signs: see a doctor immediately

• Unusually fast or laboured breathing
• Skin pulling in between or under the ribs with each breath, or flaring nostrils
• Bluish lips, tongue or fingertips
• Feeding or drinking less than half the usual amount, or clearly fewer wet nappies
• Drowsiness, hard to wake, or an unusually weak cry
• Pauses in breathing in a baby
• Fever in a baby under three months old

Do not wait for these to pass and do not give medicines without advice from a doctor or pharmacist. If roads are still cut off, call 1669 or ask the village health volunteer for help with transport.

Who is most at risk of severe RSV?

• Babies under six months, especially in the first months of life
• Premature babies
• Children with congenital heart disease or chronic lung disease
• Children with weakened immunity or neuromuscular conditions that make it hard to clear mucus
• Older adults, particularly those with heart or lung disease, diabetes or weak immunity
• People with asthma or COPD, whose symptoms may flare with RSV

In widely flooded provinces like Ang Thong, many households have both babies and grandparents under one roof, so prevention has to protect everyone at once.

Vaccines and protection for high-risk groups

Today there are RSV vaccines for older adults, a vaccine given during a specific window of pregnancy, and ready-made antibody products for some infants in many countries. Availability and suitability depend on the individual, so ask a doctor or your local health service. This article does not recommend any medicine or vaccine in place of medical advice.

The impact when RSV spreads through a home or centre after a flood

Health

A child with severe illness may need hospital care, and when one child gets sick, siblings, parents and grandparents often follow.

Costs

Hospital trips on flooded roads, food and expenses while staying with a sick child pile on top of house repairs.

Time and work

Parents take leave to care for children just when they need income most to rebuild.

Trust in childcare centres and schools

If several children fall ill soon after a centre reopens, parents worry and may keep children away. Showing that the building has been cleaned and disinfected systematically helps rebuild confidence.

Why ordinary cleaning falls short where young children are

• Wiping only what looks dirty. Viruses are invisible; a surface that looks clean may still carry germs from other hands.
• Rinsing toys in plain water. It removes grime, but use soapy water, dry, then disinfect appropriately.
• Using bleach that is too strong. It can irritate children's airways, and the CDC warns never to mix bleach with other cleaners.
• Air freshener. It kills nothing and strong scents irritate small noses.
• Cleaning once before reopening without a daily routine for shared touch points.
• Forgetting bathrooms, sinks and changing tables, where every hand passes.

Professional spraying does not replace handwashing or daily cleaning. It "resets" building surfaces after a flood, before the daily routine takes over.

WHD disinfection spraying and RSV

World Health Disinfection (WHD) provides a disinfection spraying service for homes, childcare centres, schools and other buildings. According to the service information, trained technicians apply disinfectant by spraying and/or ULV (Ultra Low Volume) fogging so that it covers surfaces evenly.

The product is CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. According to the service information, it is broad-spectrum against viruses, bacteria and fungi, and the service page lists RSV among the organisms it covers, alongside COVID-19, influenza H1N1, avian influenza H5N1 and hand-foot-mouth virus, with a stated efficacy of 99.99%. The product page states 99.85% against the COVID-19 virus within one minute. These are the figures as stated by the product and service pages.

The service page also lists approvals and references including the Thai Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019, the European standard for testing the virucidal activity of disinfectants used in medicine. Customers include hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

What spraying can and cannot do

Spraying reduces germs on surfaces on the day it is done. It does not stop person-to-person spread through coughs and sneezes, and it gives no lasting protection: once a sick person enters, surfaces can be contaminated again. Handwashing, covering coughs, keeping sick children at home and cleaning shared touch points daily remain the heart of RSV prevention.

How spraying works for homes and childcare centres after a flood

1. Book. Describe the area, number of rooms and how it is used, for example a home with a baby, a childcare centre or a kindergarten classroom. Call 065-556-6294 or LINE @whd268.
2. Prepare. Clear mud, wash floors, walls and furniture with clean water and detergent, ventilate until dry, wash toys in soapy water, launder blankets and mats, and store bottles, teats, food and dishes in closed cupboards.
3. Everyone leaves. Children, carers, older relatives and pets stay outside the zone while technicians spray.
4. Technicians spray and/or ULV-fog play floors, crib rails, tables, chairs, bathrooms, sinks and shared touch points.
5. Wait as instructed. According to the service information, the usual wait is about 30 minutes before normal use. Always follow the re-entry time the technicians give on the day.
6. Afterwards, open windows and wipe surfaces that children mouth or that touch food, such as trays, crib rails and plastic toys, with clean water before children use them.

According to the service information, customers receive a free CHEMGENE spray bottle and WELLGIENIC wet wipes, and a tax invoice is available, useful for centres and schools that must follow procurement rules.

10 reasons homes with babies and childcare centres should book spraying after a flood

1. RSV lasts hours on hard surfaces, so reducing germs on crib rails and tables lowers the chance that little hands carry it to mouths.
2. RSV is on the list of organisms stated in WHD's service information.
3. The post-flood period overlaps RSV season, as the Department of Disease Control warns every year.
4. Childcare centres bring children from many homes together, so starting with disinfected surfaces helps in the first week back.
5. ULV mist reaches under tables, behind cupboards and into corners that hand-wiping may miss.
6. A medical-grade, broad-spectrum product, according to the product information.
7. Trained technicians know how to store children's items before spraying and how to prepare the area.
8. Short downtime. According to the service information, the wait is about 30 minutes, so a home or centre can be used the same day.
9. Tax invoices for agencies and schools.
10. Advice first. Ask about child-occupied spaces, precautions or test data through the disinfection service page.

Before and after: a childcare play room after the flood

This comparison is illustrative; real results depend on the building and ongoing care.

Example case: a riverside child development centre before reopening

This is an illustrative example, not a review from a real customer.

Teacher Nok runs a child development centre near the river. She knew that when it reopened, more than thirty children from several villages would be together again, many having just spent weeks in crowded relatives' homes. She planned three steps.

First, staff and volunteer parents threw out flooded sleeping mats, cleared mud, scrubbed floors and left the building open to dry for three days. Second, she booked disinfection spraying for the day before reopening. The technicians asked that children's belongings be stored away and that everyone stay outside during the work. After waiting the time they specified, staff wiped food trays and plastic toys with clean water. Third, Nok messaged parents asking them to keep children with fever, cough or runny nose at home and see a doctor, and set up a handwashing station at the entrance.

Spraying gave the centre a clean start, she says, but the daily rules everyone follows are what keep children safe in the long run.

RSV prevention checklist for homes with young children after a flood

Protect people

• Wash hands with soap and clean water for at least 20 seconds before holding a baby, before making bottles and after wiping noses.
• If clean water is not available, use alcohol hand gel temporarily.
• Adults with a cold should wear a mask near babies and avoid kissing children's faces.
• Cough or sneeze into a tissue or your elbow, then wash your hands.
• Keep sick children at home and out of childcare until they recover.
• Keep cigarette smoke and cooking smoke away from children.
• Ask a doctor about vaccines and protection for babies, pregnant women and older adults.

Protect the home

• Clear mud and dry the house before bringing children back.
• Wash toys in soapy water; launder blankets and soft toys and dry them fully.
• Clean shared touch points every day.
• Open windows when the rain stops.
• Book disinfection spraying after washing and drying, keep everyone out during application and wipe mouthed surfaces with clean water afterwards.

Frequently asked questions about RSV and post-flood spraying

Can RSV spread through floodwater?

No. RSV spreads through droplets, close contact and contaminated surfaces. Floods matter indirectly through crowding, closed rooms and difficult hygiene.

How is RSV different from a common cold?

In older children and adults it can look just like a cold, but in babies and toddlers RSV can reach the small airways and lungs and cause breathing difficulty. Only a doctor can diagnose it.

Does the disinfectant WHD uses cover RSV?

According to the service information, WHD's page lists RSV among the organisms covered by its CHEMGENE HLD4H spraying service. Spraying reduces germs on surfaces; it does not prevent spread through coughs and sneezes.

Should we clean first or spray first?

Always clean first: clear the mud, wash and dry. Disinfectants work best on clean surfaces.

Can a baby stay at home during spraying?

No. Everyone leaves the zone and returns at the time the technicians give. Then wipe surfaces the baby touches or mouths with clean water. No disinfectant should be assumed to leave zero residue.

How often should we spray?

Spraying gives no permanent protection. It suits the recovery period after a flood or after illness in the building, while daily cleaning of shared touch points should continue. Ask the WHD team what frequency suits your site.

My child developed a cough and fever after we returned home. What should I do?

See a doctor, especially for a baby, fast breathing, chest indrawing or poor feeding. If travel is difficult, call 1669.

Bring your children home to a cleaner, safer space

After a flood, young children need a home that is dry, clean and disinfected, and adults who wash their hands and know the danger signs of RSV. Let WHD finish the recovery work in your home or childcare centre.

Book post-flood disinfection spraying

Phone 065-556-6294 · LINE @whd268 · worldhealthdisinfection.com

Related links and references

WHD links

• WHD disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential and building ozone disinfection

References

• Thai Post report on Chao Phraya levels and impacts in Ang Thong, 2026: thaipost.net
• US CDC: RSV and Floods
• World Health Organization: Fact sheets
• Department of Disease Control, Thailand: ddc.moph.go.th