A 96-Bed Care Home: 34 Residents Infected, 11 Hospitalised, and Only 9 of 22 Staff Left Working
Last updated: 6 Sep 2026 | 21 Views |
COVID-19 disinfection sprayer 2026 for care homes, nursing homes and long-term care
A 96-Bed Care Home: 34 Residents Infected, 11 Hospitalised, and Only 9 of 22 Staff Left Working
Why the place caring for the most vulnerable people needs the strictest air management of all.
A care home is where the most vulnerable people live at the highest density: eight beds to a room, an activity hall everyone gathers in twice a day, a dining room where everyone eats at once — in a building sealed with the air conditioning on permanently, because elderly residents cannot tolerate the heat. This is what happened at one home in central Thailand.
A care home combines the three most dangerous conditions in one place. Residents are the highest-risk group by age and comorbidity, they are in the same building twenty-four hours a day, and the building must stay sealed with the air conditioning running because elderly people cannot tolerate the heat.
Care home staff work extremely hard and carefully: beds wiped, linen changed, bathrooms cleaned, wheelchairs sanitised, hands washed before and after every resident. All correct, and all surface work — while the eight-bed rooms and the activity hall where everyone gathers have never had their air managed at all.
What follows is the whole story: the first day, the eleven residents sent to hospital, and the change that stopped it. At the centre of it is the AIROFOG U260 ULV cold fogger, a German-engineered machine producing 15-30 micron droplets.
The story
A building with the air conditioning on twenty-four hours a day
Porntip directs a care home in central Thailand looking after ninety-six residents with an average age of seventy-eight, with twenty-two staff: fourteen care assistants, three registered nurses, three cooks and two administrators.
The building has two floors and twelve shared bedrooms of eight beds each, with about a metre between beds. There is one large activity hall everyone gathers in morning and afternoon, and a dining room where all residents eat together three times a day.
The air conditioning runs twenty-four hours and the windows stay shut, because many residents cannot tolerate the heat and opening windows lets in mosquitoes — a separate risk for this group.
That month one care assistant came in feeling unwell. She was on a daily wage with two children in school; a day off meant income genuinely lost.
Fourteen days: 34 residents and 13 staff
The first week saw seven residents with fever, across three bedrooms. The second week it reached twenty-two, and within fourteen days thirty-four of ninety-six.
Eleven of them were unwell enough to be sent to hospital — a very heavy number for a home this size, and something that had to be reported to the supervising authority immediately.
Staff followed: thirteen of twenty-two fell ill, leaving nine people to care for ninety-six residents, including those who must be fed, have incontinence care, and be turned every two hours.
The home had to request support staff from the supervising authority and hire temporary assistants urgently — skilled work that is not easy to fill at short notice.
What can never be recovered
The financial cost came to about 450,000 baht in temporary staff wages, the home's share of medical costs, hospital transport and overtime for the remaining staff.
But Porntip says that number is not what she thinks about looking back. In a group averaging seventy-eight years old with existing conditions, one serious illness usually means the body does not return to where it was.
Several residents came back from hospital walking less than before, using a wheelchair instead of a stick, and needing permanently more intensive care — a burden the home carries for years afterwards.
Relatives of five residents asked to move them out, either home to family or to another facility. Porntip understood the decision, and had no good answer to ask them to stay.
The advice from the hospital's infection control nurse
When the home sent eleven residents to hospital, that hospital's infection control nurse came to look at the facility and give advice.
She noted that the home's handwashing and surface cleaning were excellent — at ward standard. What a ward had and the home did not was air management in the shared rooms.
She explained that the hospital used a ULV fogger on shared patient rooms and waiting areas as routine work, not as an emergency measure, and said a home with eight-bed rooms needed it even more.
What the home needed was a machine that could fog bedrooms one at a time while residents were out at activities, treat the activity hall and dining room in their empty windows, and be operated by staff without waiting for a contract budget.
What it actually costs
An elderly person who falls seriously ill often does not return to where they were
In a group averaging seventy-eight with existing conditions, one serious illness often causes permanent decline. Many who came back from hospital walked less and needed more intensive care from then on.
Care staff cannot easily be replaced
Care assistant work requires specific skills: turning residents, feeding, caring for bed-bound patients. With nine staff left for ninety-six residents, urgent replacement hiring is close to impossible.
Relatives move residents out and you have no answer
When relatives hear that thirty-four residents are infected and eleven hospitalised, moving a parent out is an understandable decision — and a home with no answer about air management cannot ask them to stay.
An event like this must be reported to the supervising authority
Sending eleven residents to hospital is a reportable event requiring a recurrence-prevention plan, bringing documentation and follow-up inspection obligations that last a long time.
Why the usual fixes fail
Handwashing and surface cleaning to standard
Washing hands before and after every resident is one of the most important measures there is and must continue. But it addresses the contact route, not the air route — entirely different pathways.
Spacing beds further apart in shared rooms
An eight-bed room has limited space; beds can only move a few tens of centimetres. And in a sealed room with the air conditioning running twenty-four hours, fine aerosol still travels throughout with the airflow.
Requiring residents to wear masks at all times
Many elderly residents have breathing difficulties, dementia that leads them to remove a mask, or hearing loss requiring lip-reading. Enforcing masks twenty-four hours a day is neither possible nor appropriate.
Opening windows to ventilate
The building cannot open windows: many residents cannot tolerate the heat, and open windows let in mosquitoes — a distinct risk for this group in particular.
Deep cleaning after the outbreak
A deep clean after the fact makes the building spotless on the day, and the following week puts everything back — because residents are still in the same building twenty-four hours a day.
What shared bedrooms and activity halls actually need
The requirement is not more frequent wiping. It is a treatment aimed at the volume of air in the shared bedrooms, the activity hall and the dining room, done room by room while each is empty, without disrupting residents' routine.
That is exactly what ULV cold fogging is designed for. ULV, ultra-low volume, means the machine breaks disinfectant into droplets fine enough that the output behaves more like fog than spray. The mist stays airborne long enough to fill the room, then settles evenly on every surface, including the ceiling, vents, bed rails and privacy curtains.
The machine Porntip's home chose is the AIROFOG U260: a German-engineered ULV cold fogger with an 800-watt motor and an adjustable nozzle producing 15-30 micron droplets, running on water plus the disinfectant the home selects.
10 reasons the AIROFOG U260 solves it
1. 15-30 micron droplets treat a whole shared bedroom
An eight-bed room has bed rails, bedside tables, privacy curtains, wheelchairs and a ceiling that wiping can never cover daily. Droplets in this range fill the room's volume and settle across every surface in one pass.
2. Rooms can be fogged one at a time while residents are at activities
Residents already leave their bedrooms for the activity hall morning and afternoon. Fogging one room at a time in those windows requires no change to anyone's routine.
3. It treats the activity hall and dining room where everyone gathers
The hall where ninety-six residents gather twice a day, and the dining room where all eat together three times a day, are where everyone in the building meets. Fogging these between sittings matters most of all.
4. An 800-watt motor covers the whole two-storey building
One machine covers twelve shared bedrooms, the activity hall, the dining room, the bathrooms and the treatment room. The home does not need several units, which matters greatly for its budget.
5. The adjustable nozzle is safe around bedding and medical equipment
Bedrooms hold mattresses, blankets, privacy curtains, electric beds and oxygen concentrators. A drier nozzle setting means bedding does not become damp and equipment is not damaged.
6. It runs on a solution suitable for a home caring for elderly people
The U260 is a delivery system, not a chemical lock-in. The home can choose a low-odour solution appropriate for residents with respiratory conditions, and we work out the correct dilution.
7. Floors dry fast and are not slippery, which matters enormously here
Falls are among the highest risks for elderly residents. Cold fogging at this droplet size leaves a very thin, fast-drying film rather than a puddle, so residents return to their rooms safely.
8. Staff can run it themselves, with no waiting for a contract budget
No waiting for the supervising authority to approve a contractor's occasional visit, which usually means a few times a year. Staff can fill and fog daily, learning it in an afternoon.
9. It is the same class of equipment hospitals use
The U260 was designed for COVID-19 disinfection and is used in hospital and laboratory settings. For a home caring for a vulnerable group and reporting to a supervising authority, that provenance is appropriate.
10. It gives relatives an answer when they ask what you are doing
A home that fogs daily has a schedule and a log relatives can see — a concrete answer when they ask how their parent is being cared for, and often what makes them comfortable enough to leave them where they are.
Before and after
Before
- Surface cleaning only — beds wiped, linen changed, hands washed to standard
- 12 shared bedrooms of 8 beds each, sealed with air conditioning 24 hours, no air management at all
- Ceilings, vents, privacy curtains and bed rails never disinfected
- 34 of 96 residents infected and 11 sent to hospital within 14 days
- 13 of 22 staff ill, leaving 9 people caring for 96 residents
- About 450,000 baht in costs, and relatives moving 5 residents out
After
- ULV fogging of shared bedrooms one at a time while residents are at morning and afternoon activities
- The activity hall and dining room fogged after every use
- Coverage of ceilings, vents, privacy curtains, bed rails and wheelchairs
- Floors dry within minutes and not slippery, residents return on their normal routine
- No further infection cluster in the following year and no further hospital transfers from this cause
- A daily fogging schedule and log available to relatives and the supervising authority
How we get you started, in 3 steps
1. Look at the actual building, not just the bed count
How many shared bedrooms and what size, ceiling height, where the air conditioning sits, the size of the activity hall and dining room, and when each room is empty in the daily routine. Those five things decide the sequence and timing. Send us the floor plan.
2. Install the machine and train the staff
We deliver the U260 with the nozzle set dry enough for rooms with bedding, privacy curtains and medical equipment, a recommendation for a low-odour solution suitable for residents with respiratory conditions, and a room-by-room sequence. Training takes an afternoon, and we provide documentation for your budget process.
3. Fit it into the daily routine you already run
The routine that works is boring and repeatable: fog bedrooms one at a time while residents are at activities, and fog the activity hall and dining room after every use. Once it is in the daily schedule it becomes ordinary work with a record every day.
What a customer says
“We were very strict about handwashing and wiped the beds every day — genuinely at ward standard. But the hospital's infection control nurse pointed out that what a ward has and we did not was air management in the shared rooms. Now we fog the bedrooms one at a time while residents are at activities, so nobody's routine changes at all, and we have had no cluster at all this year.”
Porntip — Director, care home, central Thailand
Why elderly care settings need stricter measures than anywhere else
In most settings an infection means a few days off and then a return to normal. In a group averaging seventy-eight with existing conditions, the outcome is entirely different.
One serious illness in this group often leads to hospital admission; hospital admission leads to days in bed; and days in bed for an elderly person leads to permanent loss of muscle mass and walking ability.
That means many residents come back from hospital needing more care than before, which increases the load on staff who are already fewer — a cycle that keeps making the situation worse.
This is why prevention in a care home is worth far more than the cost figures suggest. What you are preventing is not just illness; it is permanent decline in the people you look after.
What 15 to 30 microns actually means in practice
Droplet size is the specification that decides whether a machine solves this problem or merely makes things wet. Below roughly 10 microns, droplets are so light they can drift away before doing useful work. Above about 50 microns they behave like spray: they fall fast, leaving bedding damp and floors slippery — extremely dangerous for elderly residents.
The 15-30 micron band is the working range. Droplets stay airborne long enough to fill a shared bedroom's volume and reach the ceiling and vents, then settle as a thin, even, fast-drying film. Floors are not slippery and residents return on their normal routine.
It is also why an adjustable nozzle matters more than tank size. A bedroom with mattresses, privacy curtains and electric beds needs a drier setting than a tiled bathroom. Adjusting the nozzle gets you both from one machine.
For a care home the practical test is simple: after a pass the floor should be dry and not slippery within minutes, the mattresses should not feel damp, and the ceiling above the row of beds should genuinely have been treated.
Frequently asked questions
Is it safe for residents with respiratory conditions?
Fogging is done only when no residents are in the room, with a waiting period afterwards depending on the solution used. We recommend low-odour or odourless products specifically for elderly care settings.
Will floors be slippery? Our residents are at risk of falls.
No. ULV cold fogging at 15-30 microns leaves a very thin film that dries by itself within minutes, not a puddle. We set the nozzle for your floor materials at installation, and this is the point we prioritise most for settings like yours.
How long does an 8-bed shared room take?
Only a few minutes per room, plus a short closed-room pause — which fits the window while residents are at morning or afternoon activities.
Will mattresses, privacy curtains and electric beds be damaged?
No, with the nozzle set dry enough and electric beds and medical equipment switched off during the pass. We build this into a checklist at installation.
What about bed-bound residents who cannot leave the room?
We plan zone-based fogging or a temporary move to an adjacent room as appropriate, and in some cases treat that room last, when staff are available to assist. We map this out at installation.
Can our staff run it themselves?
Yes. Fill, set the nozzle, fog the room, close the door and wait. We train them at handover — it takes an afternoon — with no waiting for an occasional contractor.
How often should a care home fog?
Shared bedrooms daily during activity periods, the activity hall and dining room after every use, and bathrooms on a schedule. Consistency matters far more than intensity.
Is there documentation for our budget process?
Yes. We provide complete machine specifications and product documentation for procurement and for reporting to your supervising authority.
What you prevent is not just illness — it is permanent decline in the people you care for
Porntip's home spent about 450,000 baht, sent eleven residents to hospital, and lost five residents whose relatives moved them out — with several of those who returned not returning as they were.
A daily ULV fogging routine costs a sum an ordinary materials budget can carry, and runs in windows the daily routine already provides. It covers whole rooms including ceilings and vents, and gives relatives a concrete answer.
If you run a care home, a nursing home, a residential facility or a long-term care setting, send us the floor plan and we will tell you exactly what it needs, with documentation for procurement.
See the AIROFOG U260 ULV cold fogger, specifications, droplet range and price
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