A typical scenario: a nap room that has only just dried out

(Example case. The people and events here are illustrative, not real individuals.)

Teacher Ann runs a small child development centre in Kabin Buri district, caring for about forty children aged two to four. In late September 2026, water poured into the nap room and the toy store. Mattresses, soft toys, wooden blocks and picture books sat in floodwater for days. The centre closed and the children went home, though many homes were flooded too, and some children ended up staying with relatives, several families under one roof.

When the water dropped, Ann and volunteer parents shovelled out the mud, scrubbed the floors, sun-dried the mattresses that could be saved and threw away fabric and sponge toys that had started to grow mould. Then a message arrived in the parents' LINE group: a child in a neighbouring village had a fever, a sore mouth, refused food and had red spots on the palms and soles. The doctor said it was hand, foot and mouth disease. A few days later two more children nearby fell ill the same way.

Parents began asking when the centre would reopen and whether their children would catch it there. Ann could only promise to clean as thoroughly as possible, but privately she wondered whether ordinary floor cleaner was enough, how to wash the plastic toys that survived, and what to do with the children's toilet, potties and nappy-changing table.

Her worry is well founded. The viruses behind hand, foot and mouth disease are tougher than many respiratory viruses, and a child care centre is one of the easiest places for them to spread. The answer is not to scrub harder in the same old way, but to follow the right order and combine several layers of protection.

The 2026 Prachin Buri flood: seven districts, nearly 40,000 households

According to Thai PBS, flooding hit seven districts of Prachin Buri: Kabin Buri, Si Maha Phot, Na Di, Mueang Prachin Buri, Prachantakham, Ban Sang and Si Mahosot. A total of 39,977 households were affected, and farmland including rice fields, shrimp ponds and orchards went under water. Khaosod English reported that Wang Dan sub-district in Kabin Buri was in a critical situation.

In farming communities like these, local-authority child development centres, kindergartens and home nurseries are what allow parents to go to work. When centres close, parents who need to rescue rice fields, repair shrimp ponds or clear orchards must take their children along or leave them with relatives. Reopening quickly matters for the whole community's recovery, but reopening before a centre is ready can start an outbreak.

Timing adds to the concern. Thailand typically sees more hand, foot and mouth cases during the rainy season, according to the surveillance data the Department of Disease Control publishes each year. A flood landing in the same season is a reason to prepare more carefully than usual.

Understanding the hand, foot and mouth disease virus (Enterovirus)

Hand, foot and mouth disease (HFMD) is caused by enteroviruses, small RNA viruses. The most common culprits are coxsackievirus A16 and enterovirus A71 (EV71), with others such as coxsackievirus A6 also seen. Because several viruses can cause the disease, a child can catch it more than once.

Why this virus is tougher than the common cold

Enteroviruses are non-enveloped viruses. Unlike coronaviruses or influenza, they lack a fatty outer coat, which makes them hardier in the environment, longer-lived on surfaces and more resistant to some disinfectants. A clear example: alcohol hand gel may work less well against enteroviruses than washing with soap and water, which is why health agencies emphasise soap-and-water handwashing for this disease.

This matters when choosing a disinfectant and a method. Not every product works equally well on this group; it needs evidence against non-enveloped viruses and must be used for the stated contact time.

How it spreads

• Direct contact with secretions such as saliva, nasal mucus and blister fluid
• Droplets from coughs and sneezes at close range
• The faecal-oral route. Infected people shed the virus in stool, sometimes for weeks after symptoms have gone
• Contaminated surfaces and objects such as toys, spoons, cups, door handles and changing tables

The incubation period is usually about three to six days. People are generally most contagious in the first week of illness, and some adults are infected without symptoms, passing the virus on unknowingly.

How floods raise the risk of hand, foot and mouth disease in child care centres

Floods do not create enteroviruses, but they set up conditions that help them spread.

• Sewage-contaminated water. When toilets, septic tanks and drains overflow, floodwater carries faecal matter indoors. Enteroviruses are shed in stool and are found in sewage, so flooded surfaces must be washed and disinfected before children use them again.
• Disrupted water and handwashing. Tap water may stop or run dirty, and children's basins may not work, making soap-and-water handwashing, the single most important defence, harder.
• Children from many families mixing. While the centre was closed, many children stayed in crowded relatives' homes or shelters, giving the virus chances to move between them and back into the centre on reopening day.
• Soaked toys and equipment. Plastic toys, mattresses, pillows and rubber play mats may carry mud, sewage residue and biofilm that shield germs from disinfectant.
• Peak season overlap. The rainy season is already a high season for HFMD in Thailand.
• Exhausted staff. The burden of restoring the centre can unintentionally loosen daily hygiene routines.

Where hand, foot and mouth viruses hide in a post-flood child care centre

Picture a toddler's day: whatever they touch tends to end up in their mouth. Risk points in a centre differ from an ordinary building, so prioritise like this.

Very high risk

• Plastic toys, building blocks, rubber dolls and anything children mouth
• Nappy-changing tables, potties, child-height toilets and low basins
• Dining tables, children's chairs, compartment trays, spoons and cups
• Taps, water dippers and buckets in the bathroom

High risk

• Door handles and edges at a child's reach
• Classroom and nap-room floors where children sit, crawl and sleep
• Vinyl-covered mats, nap cushions and crawling mats
• Rails, shelf edges and bag cubbies
• Flooded playground equipment such as slides, swings and sandpits

Often forgotten

• Light switches, fan remotes and teachers' phones
• Pens, the drop-off sign-in book and the parents' reception counter
• Pushchairs and baby carriers left at the centre

For fabric, sponge or other porous items that sat in floodwater, such as soft toys, foam mattresses and large rugs, CDC flood cleanup guidance is to consider discarding anything that cannot be thoroughly cleaned and dried, because germs and mould can stay inside. Spraying cannot rescue these materials.

Symptoms of hand, foot and mouth disease, and danger signs that need hospital care

Most cases are mild and clear up within about seven to ten days, but children feel quite unwell, and some, particularly with EV71, can develop serious complications. Watch closely.

Common symptoms

• Fever, often first, with tiredness, poor appetite and sore throat
• Mouth sores that start as red spots and become blisters and shallow ulcers on the tongue, gums and inner cheeks, so children drool and refuse food
• A rash or small blisters on the palms and soles, sometimes on the buttocks, knees or elbows, usually not itchy
• In some children, fingernails or toenails peel off weeks later, usually growing back normally

Who is most at risk

• Children under five, who have not yet built immunity to many strains
• Children in nurseries and kindergartens, who play closely and share things
• Siblings of a sick child
• Teachers, carers and parents who change nappies and feed children; adults are usually mildly affected or symptom-free but can spread the virus
• Women close to giving birth, who should consult a doctor after contact with a sick child

There is no specific antiviral for HFMD; care focuses on symptoms as a doctor advises. Ask your doctor whether the EV71 vaccine is suitable for your child.

What an outbreak costs a centre that is just recovering

• Children's health. A child whose mouth hurts too much to eat risks dehydration and needs close care; some need hospital.
• Parents' livelihoods. Sick children must stay home until a doctor says they can return, so parents rebuilding farms lose more workdays.
• Centre operations. Several cases in one room may lead health officials to advise a temporary closure, on top of the flood closure.
• Costs. Hospital trips, replacement toys and equipment, and repeated cleaning add up.
• Trust. Parents hesitate to return; private nurseries lose families and local-authority centres face community pressure.

Why usual cleaning may fall short against hand, foot and mouth viruses

1. Alcohol gel instead of handwashing. Convenient, but less effective against enteroviruses than soap and water.
2. Ordinary floor cleaner. Many are formulated for shine and scent, without evidence against non-enveloped viruses.
3. No pre-cleaning. Mud and sewage residue in toy grooves and floor joints keep disinfectant away from the virus.
4. Ignoring contact time. Wiping disinfectant dry immediately leaves hardy viruses alive.
5. Mixing chemicals at home. Bleach that is too strong irritates children's airways; mixing it with toilet cleaners can release dangerous gas.
6. Classrooms only. Toilets and changing areas, where faecal contamination is heaviest, get less attention.
7. Reopening without screening. Even with clean surfaces, one sick child can reseed a whole room.

That last point is the heart of prevention. Spraying gives you a clean starting point; daily screening, keeping sick children at home and soap-and-water handwashing keep the centre safe afterwards.

WHD disinfection spraying for child care centres after the flood

World Health Disinfection (WHD) offers a disinfection spraying service delivered by trained technicians using spraying and/or ULV (Ultra Low Volume) fine-mist fogging. According to the service information, the disinfectant is CHEMGENE HLD4H, a UK medical-grade disinfectant containing benzalkonium chloride and didecyldimethylammonium chloride.

What the efficacy information says about hand, foot and mouth disease

According to WHD's service and product information, the hand-foot-and-mouth virus is among the organisms the product is stated to cover, alongside norovirus (also non-enveloped), RSV, COVID-19, influenza H1N1, avian influenza H5N1, bacteria and fungi. The service page states 99.99% efficacy and references the Thai Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019, the European virucidal test standard. WHD describes the product as broad-spectrum, killing many types of germs, without stating a number of strains.

How the service works for a child care centre

1. Book and survey. Share the number of rooms, floor area, children's toilets, changing areas and playground.
2. Prepare. Remove mud, wash surfaces with water and detergent, discard flooded porous items, wash toys you are keeping, store food, milk bottles and children's personal items, and make sure everyone leaves the zone.
3. Technicians spray, starting with toilets, changing areas and toy corners, then classrooms and corridors.
4. Wait for the technicians' re-entry time, typically around 30 minutes according to the service information, then ventilate.
5. Rinse mouthed surfaces, such as toys and dining tables, with clean water as technicians advise before children return.

10 reasons to spray a child care centre before reopening after a flood

1. The hand-foot-and-mouth virus is named in the service information's list of covered organisms.
2. Several germ groups in one visit: viruses, sewage bacteria and moisture-loving fungi.
3. Fine mist reaches awkward spots under low tables, around chair legs, shelf grooves and floor joints.
4. It frees up exhausted teachers to prepare lessons and screening routines.
5. Trained technicians control the dose and wear protection, so no one mixes chemicals at home.
6. Risk-ordered treatment starts with toilets and changing areas, where faecal contamination is heaviest.
7. Clear communication with parents about what was done before reopening. See the service details.
8. Tax invoices for local-authority centres and schools that need reimbursement.
9. A free CHEMGENE spray bottle and WELLGIENIC wet wipes under the current promotion, for daily touch-ups.
10. Experience with schools and hospitals, which WHD lists among its customers. Request a quote.

Before and after a systematic reopening

Example case: a rice-country nursery that reopened with confidence

(Illustrative example, not a verified customer review.)

Back to Teacher Ann. After talking to the sub-district administration and the local health promoting hospital, the centre postponed reopening by a few days to do everything properly. Toys went into three piles: flooded fabric and sponge toys were thrown away; flooded hard plastic toys were washed one by one in detergent and sun-dried; toys stored upstairs stayed as they were.

Once the building was dry, WHD sprayed the classrooms, nap room, children's toilets, changing area and kitchen with nobody inside. After the re-entry time, staff opened the windows and rinsed dining tables and toys with clean water.

On reopening day, Ann set up a screening table at the door, checking every child's mouth, palms and temperature. A parent who arrived with a feverish child was advised to see a doctor first. Children washed hands with soap before meals and after the toilet, and staff wiped handles and tables every evening with the spray provided. The centre never promised that no child would fall ill, but parents knew there was a plan and that they would be told immediately if a case appeared.

Checklist: before and after spraying a child care centre

Before spraying

• Remove mud and discard flooded fabric toys, foam mattresses and rugs that cannot be cleaned and dried.
• Wash hard plastic toys, tables, chairs and floors with clean water and detergent.
• Check that tap water and children's basins work.
• Open windows so the building dries before the appointment.
• Store food, milk bottles, toothbrushes and children's personal items.
• Make sure everyone leaves the zone to be sprayed.

After spraying

• Wait the full re-entry time, then ventilate.
• Rinse mouthed toys, dining tables and nap-room floors with clean water as advised.
• Screen children every morning for mouth sores, hand and foot rashes and fever.
• Keep sick children at home and send them to a doctor; they return when the doctor says so.
• Wash hands with soap and water, children and adults alike, especially after nappy changes.
• Give each child their own cup, spoon and towel.
• Clean toys and high-touch points every day.

Prevention measures to combine with spraying

Thailand's Department of Disease Control and international health agencies recommend these core measures in child care settings:

• Soap-and-water handwashing, the most important measure, before eating, after the toilet and after nappy changes
• Daily screening, and separating any child who develops symptoms during the day
• Sick children stay home until recovered, as their doctor advises
• Regular cleaning of toys and surfaces children touch
• Safe handling of nappies and stool, sealed in tied bags in lidded bins
• No sharing of cups, spoons or bottles
• Notify local health officials when several children in one centre fall ill

Where water is still standing, keep children from playing in it: floodwater may contain sewage and carries risks of stomach and skin infections and drowning.

FAQ: spraying for hand, foot and mouth disease after a flood

1. Will spraying stop children catching HFMD?

No. It reduces germs on surfaces at the time of treatment, but the virus also passes directly between children. Daily screening, sick children at home and regular soap-and-water handwashing are essential.

2. Does alcohol gel protect against HFMD?

Enteroviruses are non-enveloped, so alcohol gel may work less well than soap and water. Use soap and water as the main method.

3. Does WHD's disinfectant kill the HFMD virus?

According to the service information, the hand-foot-and-mouth virus is among the organisms it is stated to cover. Ask WHD for documents showing the tested strain and contact time.

4. Can flooded toys be reused?

Hard plastic toys that can be fully washed may be cleaned with water and detergent, then disinfected. Fabric, sponge or toys with hollow insides where water collects should be considered for disposal, in line with CDC guidance.

5. How long before children can come back in?

Wait for the technicians' re-entry time, typically around 30 minutes according to the service information, ventilate, and rinse mouthed surfaces with clean water before children arrive.

6. What if a child falls ill after reopening?

Ask parents to take the child to a doctor, inform local health officials and clean the room thoroughly. With several cases, a repeat spray may be considered on officials' advice.

7. Can adults catch it?

Yes, though usually mildly or without symptoms, so adults may spread it unknowingly. Staff should wash their hands often too.

Get nurseries and kindergartens ready after the flood so children can return safely

Call 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com

Related links and references

WHD services and information

• World Health Disinfection spraying service
• CHEMGENE HLD4H medical-grade disinfectant
• Residential ozone disinfection (a complement for musty air)

External references

• Thai PBS on the Prachin Buri flood (seven districts): thaipbs.or.th/news/content/558982
• Khaosod English reporting on Wang Dan, Kabin Buri
• World Health Organization fact sheets: who.int/news-room/fact-sheets
• CDC, floods and your health: cdc.gov/floods
• Department of Disease Control, Thailand: ddc.moph.go.th