The Doctor Who Treated Allergy Patients All Day, Then Got Sick From His Own On-Call Room Mattress — And the Dust Mite Removal Service That Ended It

At 3:40 in the morning on Wednesday 11 June 2025, in the fourth-floor on-call room of the inpatient building at a 320-bed provincial hospital in Kamphaeng Phet Province, Thailand, Dr. Thanawat Sripathumwong, a 29-year-old second-year internal medicine resident, had been lying down for exactly twenty minutes when he had to sit up again. He could not breathe through either nostril.

He felt around in his white coat pocket for his nasal spray, took two puffs per side, and then sat with his head bowed for another seven minutes waiting for his airway to open. While he waited, he scratched the inside of his left elbow without noticing he was doing it. The red patch that had first appeared in January was back, and this time it had crept up the right side of his neck — the side he always slept on, pressed into the pillow.

"Honestly, I was too tired to think about it," Dr. Thanawat said later. "All I was thinking was that ward rounds started in three hours and I still had not slept."

Here is the part of this story that is hardest to sit with. At 10:15 that same morning, Dr. Thanawat stood at the foot of a bed belonging to a 52-year-old woman admitted with an asthma flare, and he explained to her family in a calm, confident voice: "You also need to deal with the mattress and pillows at home. Dust mites in bedding are the single most common trigger we see."

He had delivered some version of that sentence to patients hundreds of times across two years of residency. Not once had he turned around and looked at the mattress he himself slept on for hours every week.

His symptoms had started in late July 2024, when his rotation changed from occasional overnight coverage to a fixed schedule requiring him to sleep in the hospital nine to eleven nights per month. By June 2025, that was exactly eleven months.

For all eleven of those months, he explained his own condition to anyone who asked using the same three words: stress, sleep deprivation, exhaustion. The explanation sounded so obviously correct that nobody on the ward ever questioned it. Including him.

The explanation was wrong. The actual cause was less than a hand's width from his face. It was inside the mattress and pillow of the on-call room — a windowless twelve-square-metre space with the air conditioning running twenty-four hours a day, where six to eight different staff members lay down on the same mattress every single day, and had been doing so for seven years, without that mattress ever once being taken outside into the sun.

What Was Actually Happening in That On-Call Room

The turning point came on 24 June 2025. Dr. Kamonchanok Teerawat, a visiting allergy and immunology specialist who consulted at the hospital two days a week, noticed the rash on Dr. Thanawat's neck during the morning conference and pulled him aside afterwards.

She asked four questions. All four landed.

First: when are the symptoms worst? Answer: immediately on waking after sleeping in the on-call room, for roughly the first twenty to forty minutes.

Second: what happens on nights you sleep at your own apartment? Answer: much milder. Some nights, essentially nothing.

Third: where exactly does the rash appear? Answer: both inner elbows, and the right side of the neck — the side that rests on the pillow.

Fourth: when were the mattress and pillows in that room last deep-cleaned? Answer: he did not know. Nobody in the building knew.

Dr. Kamonchanok explained it plainly. A pattern that is worst on waking, eases after leaving the room, and differs sharply between hospital nights and apartment nights is the signature of an allergen embedded in bedding — not the signature of stress or fatigue. Stress does not attach itself that precisely to one specific bed.

A skin prick test on 2 July 2025 confirmed it. The wheal at the house dust mite extract site measured 11 millimetres, clearly larger than every other site on his forearm. Dr. Thanawat was strongly allergic to dust mites, and had been since childhood — his symptoms had simply always been mild enough to go undiagnosed.

What changed over the previous eleven months was not his body. It was the sheer quantity of allergen he was breathing in every night.

Because the mattress in a hospital on-call room is not an ordinary mattress. It is the hardest-working mattress in the entire building.

Why an On-Call Room Is a Near-Perfect Dust Mite Factory

Do the arithmetic the way Dr. Thanawat did, sitting alone one night after his test results came back.

A mattress in an ordinary bedroom carries one or two sleepers for about seven hours each. Total load: roughly seven to fourteen occupied hours per day.

The mattress in this hospital's on-call room was used by interns, residents, night-shift nurses and emergency duty staff — six to eight people per 24-hour cycle, one to three hours each, slotted into whatever gaps the workload allowed. That mattress was almost never unoccupied, day or night.

Which means it received sweat, exhaled moisture, body heat and shed skin cells at roughly four to six times the rate of a normal household mattress.

All Four Conditions, in One Room

One: the food supply never runs out. Dust mites feed primarily on shed human skin cells — roughly 1.5 grams per person per day. With an average of seven people cycling through, that mattress was receiving something like three to four grams of fresh food daily, since each person only slept a fraction of a night. That is more than 1.2 kilograms per year, sustained for seven years.

Two: permanent humidity. Someone who has been on their feet all night, wearing damp scrubs, lies down without showering and gets up two hours later — and the next person lies down in the same warm depression almost immediately. The moisture driven into the fibres never gets a chance to evaporate. That is a permanently damp micro-environment, which is exactly what dust mites need most.

Three: a stable, ideal temperature. The room ran air conditioning around the clock at about 25 degrees Celsius. Add near-constant body heat radiating into the mattress surface, and the contact layer sat between 26 and 30 degrees — precisely the range in which dust mite populations multiply fastest.

Four: total, permanent darkness. This on-call room sat at the innermost end of a corridor with no exterior window at all — only ceiling lights and an air conditioning vent. Dust mites avoid light. A room that is never sunlit is a room where nothing ever interrupts them.

Put those four together and the on-call room stops being merely a slightly grubby bedroom. It becomes a temperature-controlled, humidity-controlled, permanently dark cultivation system with an automatic feeding mechanism that refills every two hours, running continuously for seven years.

And what makes this particular story sting is that the whole apparatus was housed inside a building whose entire purpose is to make people well.

The Real Cost: Health, Money, and Patient Safety

On the surface, Dr. Thanawat's problem was a blocked nose in the morning, an itchy rash, and a nagging cough. Annoying, but survivable. Then he sat down and totalled up eleven months, and it stopped looking small.

1) Money spent every month that fixed nothing

He pulled up his pharmacy app receipts and hospital billing records and added up everything attributable purely to his own symptoms over eleven months.

• Oral antihistamines, averaging 780 baht per month for 11 months = 8,580 baht
• Steroid nasal spray at 640 baht per bottle, one bottle per month = 7,040 baht
• Topical steroid cream and emollients for the arm and neck rash = 4,260 baht
• Three after-hours dermatology consultations = 3,600 baht
• Skin prick allergy testing = 2,900 baht

Total: 26,380 baht. For a resident on a limited salary, that is real money. Worse, every baht of it went toward suppressing symptoms rather than removing the cause, which meant the spending had no end point.

2) Sick days, and the load that shifted onto colleagues

Over eleven months he took six sick days. Three of them for a cough persistent enough that he lost his voice and could not speak in full sentences. Two for a rash flare severe enough to require a medication change. One for a secondary sinus infection.

Every day he was out, another resident covered a double shift — which meant that person spent even more hours lying on the same mattress. The cycle fed itself and injured the whole team, not just one person.

3) The part that frightened him most: patient safety

Through March and April 2025, night-time congestion woke him an average of four times per on-call night. For part of that period he had to switch back to a first-generation sedating antihistamine, because the non-drowsy version had stopped controlling his symptoms.

"On the night of 9 April, I was standing at the medication trolley and I had to read a dosage label three times," he said, flatly. "I did not get it wrong. I caught it. But I went back to the on-call room afterwards and went cold, because I understood that I was in no condition to be making decisions about anybody's life."

Antihistamine drowsiness, plus fragmented sleep, plus a night shift, is a combination no healthcare worker wants. The World Health Organization notes that asthma and chronic respiratory disease meaningfully impair quality of life and capacity to work (see the WHO fact sheet on asthma). When the affected person is responsible for dozens of patients overnight, the consequences do not stop with him.

4) He was not the only one

Once the topic finally came up in the residents' group chat, it turned out that four of the thirteen residents had similar symptoms and had never mentioned them: morning congestion, sneezing fits after entering the on-call room, itchy patches on the arms. The inpatient nursing supervisor added that three night-shift nurses had been complaining about the same things for a long time. Every single one of them had explained it the same way — "it is just the night shifts."

Why Everything the Hospital Was Already Doing Was Not Enough

It would be unfair to say this hospital was negligent. The housekeeping team followed every standard it had. The problem is that none of those standards were ever designed to address dust mites living deep inside a mattress.

Daily linen changes — excellent, but only skin deep

The on-call rooms had sheets and pillowcases changed every morning, laundered in the hospital's high-temperature system. This is good practice and should continue. But a bedsheet is a thin membrane draped over the actual reservoir. The overwhelming majority of the mite population and the accumulated allergen sits deeper, inside the mattress core and the pillow filling, which cannot be stripped off and thrown in a washing machine.

Routine surface disinfection — a different target entirely

The hospital disinfected surfaces and fogged staff rooms on a schedule, which is essential for viruses and bacteria. But disinfection does not remove the droppings and body fragments already embedded in the fibres. The allergy problem is not whether the mites are alive or dead. It is the quantity of allergenic protein still sitting in the mattress.

The housekeeping vacuum — a genuine risk of making things worse

The facilities team owned an industrial floor vacuum. Housekeeping did try running it over the on-call mattresses for a while, and several staff noticed they sneezed harder afterwards, not less. The reason is straightforward: a vacuum without genuinely fine filtration pulls particles in and blows the very smallest ones straight back out through the exhaust — and the smallest particles are precisely the allergen. The airflow then distributes them evenly around a sealed, windowless room.

Sunning the mattress — not physically possible here

The standard advice is to carry the mattress outside into direct sun. In this building, the on-call rooms are on the fourth floor, each mattress weighs over 30 kilograms, the service lift is committed during the day, and no mattress had more than two consecutive free hours in an average week. Even if it could be done, sunlight only heats the top few millimetres while the mites retreat into the cooler core — and critically, sunlight removes not one single gram of allergen from the mattress.

Replacing every mattress — expensive, and not a fix

Procurement had at one point proposed replacing all nine on-call mattresses. That requires significant budget and a purchasing cycle. But the deeper issue is that if the usage pattern stays identical — six to eight people a day in a sealed windowless room — new mattresses return to the same condition within a few years. Buying new resets the clock. It does not solve the problem.

More medication — a polite form of surrender

The path of least resistance was to let staff keep taking antihistamines indefinitely, which is exactly what happened for eleven months. But in a hospital, asking night-shift clinicians to take sedating medication in order to tolerate a mattress is a trade that fails on every axis you can measure it.

Know Your Enemy: The Biology of the Dust Mite

Dust mites are microscopic eight-legged arthropods, distant relatives of spiders and ticks, measuring roughly 0.1 to 0.3 millimetres. They are too small to see with the naked eye. They prefer dark, humid places and cling to textile fibres, which makes mattresses, pillows, sofas, carpets and curtains ideal habitat.

They do not bite, do not feed on blood, and do not transmit infectious disease. The entire problem is their droppings. Those droppings contain proteins that a sensitised immune system reads as a dangerous foreign invader. The body responds by releasing histamine, producing sneezing, nasal congestion, runny nose, itchy eyes, conjunctivitis, rhinitis, headaches, dermatitis and itchy rashes — and, in people with reactive airways, asthma.

These particles are micron-scale: light enough to be stirred into the air by movement, but heavy enough to settle back onto the fibres within a few minutes. That is precisely why allergic people feel worst during the first twenty to forty minutes after waking. Turning over during sleep and then getting out of bed lifts a cloud of allergen to exactly face height.

A life cycle that accelerates alarmingly

A single female lays roughly 40 to 80 eggs in her lifetime. Eggs hatch in six to twelve days and reach adulthood in about a month under favourable conditions. A mattress population can therefore multiply exponentially within months. When that mattress is receiving four to six times the normal food supply, as in an on-call room, the curve steepens accordingly.

Why Thailand is a dust mite paradise

Thailand's average relative humidity sits high year-round, in many regions between 70 and 80 percent, and average temperatures fall squarely in the mites' optimal band. Cold-climate countries get a dry winter that culls mite populations naturally once a year. Thailand never gets that pause.

Combine that with modern sealed, permanently air-conditioned buildings — homes, condominiums, offices and hospital wings alike — and we manufacture more mite habitat every year. Thai allergy and respiratory disease surveillance information is published by the Department of Disease Control, Ministry of Public Health, which consistently emphasises that controlling the indoor environment is the foundation of long-term allergy management.

The Solution the Hospital Chose: World Health Disinfection's Dust Mite Removal Service

On 15 July 2025, Dr. Thanawat did something residents rarely do. He wrote a two-page memorandum to the facilities department and the hospital's occupational health committee, attached his own allergy test results, summarised how many staff reported comparable symptoms, and proposed addressing the source rather than the symptoms.

Ten days later, the facilities team called 065-556-6294 to book the dust mite removal service covering mattresses, sofas, carpets and curtains with complete disinfection from World Health Disinfection — the first company in Thailand to deliver all of this in a single visit.

The committee approved it for three reasons, all of them structural rather than promotional.

First, the service targets the fibres, not the air. It extracts allergen from deep inside mattresses, pillows, sofas, carpets and curtains and physically carries it out of the building — rather than killing mites and leaving the residue where it was.

Second, the filtration is a water filtration system combined with HEPA, trapping 100 percent of the captured dust in water with nothing released back into the room. For a sealed room with no window, that distinction is decisive. It is exactly where the hospital's own vacuum had failed.

Third, one visit covered every reservoir simultaneously: nine mattresses, fourteen pillows, three fabric sofas in staff rest areas, the carpet in the physicians' meeting room, and every blackout curtain — with curtains cleaned in place, without taking them down from the rail. That last point mattered, because the curtain hardware in this building is mounted high and awkward to dismantle.

Most importantly for a hospital: everything was done on site. No mattress had to come down from the fourth floor, no room had to close overnight, and nobody's duty roster was disrupted.

The Technology: SIRENA System, Water Filtration Plus HEPA

At the heart of the service is the SIRENA System, a dust mite removal machine engineered in Canada and driven by a 1200-watt cyclonic motor made in Italy. That is a level of suction no household vacuum or general floor machine can approach, and suction is the deciding factor in whether particles bonded deep inside fibres actually come out.

How water filtration works

Instead of a dust bag or a dry cyclone bin, SIRENA drives the dust-laden airstream through a body of water in the tank. Particles of every size are captured by the water and sink, and cannot float back out. The result is that 100 percent of the dust is trapped in the water and nothing is blown back into the room — the single most important difference from a conventional vacuum, which typically emits its finest particles straight through the exhaust.

HEPA filtration down to 0.02 micron

After the water stage, the air passes through a HEPA filter rated down to 0.02 micron, ensuring the air leaving the machine is cleaner than the air that entered it. This two-stage design is what allows the system to remove 99.99 percent of allergens — a fundamentally different objective from surface cleaning.

Certifications you can verify

The SIRENA System is certified by the Asthma Society of Canada, and additionally carries TUV Rheinland, Certified Vacuums, Dust Mite Proof and Go Green / Eco Friendly certification. For a hospital committee that needs documentation attached to an approval request, this is what moved the decision along quickly.

MASTER VACUUM for deep washing

Alongside SIRENA, the technicians use MASTER VACUUM for deep-washing mattresses, sofas and carpets where there is embedded perspiration staining or trapped odour that extraction alone will not resolve — a very common condition in on-call room bedding. Using both machines addresses allergen, staining and odour in one visit.

For sites wanting an additional layer of assurance, there is also an optional disinfection fogging service covering viruses, bacteria and fungi, which this hospital added for all on-call rooms and night-shift staff rest areas.

10 Reasons to Choose World Health Disinfection's Dust Mite Removal Service

1. The first company in Thailand to combine dust mite removal, carpet, mattress and sofa cleaning, and complete disinfection into one visit — no coordinating multiple contractors across multiple days.
2. Removes 99.99 percent of allergens, an objective in a completely different category from cosmetic surface cleaning.
3. Water filtration traps 100 percent of captured dust with nothing released back into the room, which makes it especially suited to sealed, windowless spaces like on-call rooms.
4. HEPA filtration to 0.02 micron, far finer than the dust mite allergen particles it is designed to capture.
5. A 1200-watt Italian cyclonic motor with enough suction to lift particles genuinely bonded into deep fibre layers, not merely tidy the surface.
6. Certified by the Asthma Society of Canada, plus TUV Rheinland, Certified Vacuums and Dust Mite Proof — documentation that can be attached to an institutional approval request.
7. Covers every reservoir including mattresses, pillows, sofas, carpets and curtains, with curtains cleaned in place without removing them from the rail.
8. Fully on site. Nothing has to be carried out of the building, and no storage space is needed while you wait — ideal for facilities that cannot shut down.
9. Optional disinfection fogging handling viruses, bacteria and fungi in the same visit as the dust mite removal.
10. Genuinely useful aftercare products included: WELLGIENIC disinfecting wet wipes and CHEMGENE HLD4H disinfectant for maintaining the space between service cycles.

What Actually Happened on the Fourth Floor That Day

The team arrived on Sunday 3 August 2025 at 8:30 a.m. and finished at 5:10 p.m. — approximately eight hours and forty minutes — working room by room and handing each room back as soon as it was ready, so that no shift was affected.

Step 1 — Site survey and assessment

The team walked all six on-call rooms and inspected nine mattresses, fourteen pillows, three fabric sofas in staff rest areas, the physicians' meeting room carpet and eight blackout curtains, while gathering symptom information from the nursing supervisor to decide which rooms needed the most detailed work. The room Dr. Thanawat used most often went first.

Step 2 — Preparing the space

All sheets and pillowcases were stripped and sent to the hospital laundry. Personal belongings and paperwork were cleared from the work area, protective sheeting was laid down, and the expected ready-time for each room was communicated to the duty staff in advance.

Step 3 — Extraction with the SIRENA System

The technicians worked in systematic overlapping passes so nothing was missed, concentrating on the upper third of each mattress where the face makes most contact, along every seam, around all four edges, and across every pillow. Sofas, carpet and curtains followed in sequence.

Step 4 — Showing the staff the filtration tank

This, Dr. Thanawat says, is the moment that changed how the whole floor thought about the problem. After the first mattress was finished, the team carried the water tank into the middle of the room. The clear water poured in at the start of the job had become a thick grey-brown liquid with a layer of fine sediment floating on the surface. Two night nurses stood looking at it for a long moment before one of them said, "I have been sleeping there for five years."

Step 5 — Deep washing with MASTER VACUUM

Five of the nine mattresses had embedded perspiration staining and trapped odour that extraction alone could not resolve, so the team deep-washed those with MASTER VACUUM and gave facilities the drying window in writing so the roster could be built around it.

Step 6 — Optional disinfection fogging

As requested, the team fogged all six on-call rooms and the staff rest areas, covering viruses, bacteria and fungi, using products appropriate for continuously occupied spaces.

Step 7 — Handover and aftercare products

The team walked the facilities supervisor through every room, explained ongoing maintenance, recommended a repeat interval appropriate for high-turnover sleeping areas, and handed over WELLGIENIC disinfecting wet wipes and CHEMGENE HLD4H disinfectant.

Comparing the Options for On-Call Room Dust Mites

Before and After, Fourth-Floor On-Call Rooms

The Dust Mite Myths Institutions Believe Most Often

"Our rooms are spotless — there is no visible dust at all."

Visible cleanliness and fibre-embedded allergen load are two entirely separate measurements. A room mopped daily, with linen changed every morning and nothing out of place, can still be saturated with dust mites, because mites do not live on the floor. They live inside fibre layers nobody can see into.

"The air conditioning keeps it cold and dry, so mites cannot survive."

This is the most common misconception of all. Air conditioning cools room air. It does not dry out the interior of a mattress. Moisture from the sweat and breath of people cycling through around the clock soaks in and has no route out, because there is no sun and no airflow through the mattress. The contact layer stays permanently damp no matter how cold the room feels.

"These mattresses are still fairly new."

What determines accumulation is not the age of the mattress but the number of occupied hours it has absorbed. A two-year-old on-call mattress used by seven people a day may carry more allergen than a six-year-old household mattress with a single sleeper.

"Nobody else has a problem — it is just you."

In this case, once someone actually asked, seven additional staff turned out to have comparable symptoms. Sensitised individuals show symptoms first and most obviously, but everyone else is inhaling exactly the same allergen; their bodies simply are not reacting strongly enough to be noticed yet.

"An anti-mite spray takes care of it."

Most sprays penetrate no further than the mattress surface, and crucially they do not carry the allergen out of the building. They leave the residue exactly where it was. The allergy problem is the quantity of allergenic protein still present, not whether individual mites are alive or dead.

"Do it once and it is solved forever."

This one is wrong in the opposite direction. The service drops allergen load dramatically and immediately, but as long as people keep sleeping on that mattress every day, accumulation restarts. High-usage areas like on-call rooms should therefore be scheduled on a regular cycle — the same way every piece of clinical equipment in the building has its own maintenance interval.

What the Client Said

How Dr. Thanawat's Story Ends

On the night of 12 October 2025, Dr. Thanawat was on call again. Same room, same floor, same bed. He lay down at 2:15 a.m. and was woken by a ward phone call at 4:11 a.m.

The difference was that during those two hours, he did not wake once. And when he got up, he could breathe through both nostrils without reaching into his coat pocket.

"I am not telling you residency got easy," he said, laughing quietly. "The workload is the same. The nights are the same. But before this, I was fighting two things at once without realising it — the job, and the bed. Now I am only fighting one, and the difference is enormous."

He added something else worth sitting with.

"I told patients about dust mites hundreds of times, and I never really believed it until I saw the water in that tank with my own eyes. That is embarrassing to admit. But it is exactly why I think this story should get told. If a doctor can overlook it, what chance does anyone else have?"

Today the hospital treats dust mite removal for on-call rooms and staff rest areas as routine scheduled maintenance, alongside air conditioning servicing and electrical inspection. Dr. Thanawat still tells his patients the same thing every day. The difference is that now he is speaking from experience.

Everything in One Visit, Plus Aftercare You Will Actually Use

What separates this from a general cleaning contract is that the whole job closes in a single visit: dust mite extraction with the SIRENA System, deep washing with MASTER VACUUM, and optional disinfection fogging covering viruses, bacteria and fungi. No coordinating several contractors, no booking several separate days — which matters enormously for a facility that cannot shut down.

After the service, you also receive genuinely useful products for ongoing maintenance.

• WELLGIENIC disinfecting wet wipes, which kill 99.99 percent of germs and are ideal for high-touch surfaces in an on-call room: bed rails, light switches, door handles and desks.
• CHEMGENE HLD4H disinfectant, which kills 99.85 percent of germs within one minute and continues protecting surfaces for up to 14 days.

For spaces that would benefit from steam heat on hard surfaces and awkward crevices, the Stemar steam machine can be considered alongside the service.

If Your Bedroom — or Your Organisation's On-Call Rooms — Are Making People Ill

Do not spend another eleven months on medication the way Dr. Thanawat did. Have the team assess and eliminate the source on site: mattresses, pillows, sofas, carpets and curtains, all completed in one visit.

See Full Service Details and Pricing — Click Here

Frequently Asked Questions

We already change the linen daily. Do we still need a dust mite removal service?

Yes. Changing linen only addresses the outer washable layer, while the majority of the mite population and accumulated allergen is embedded deep inside the mattress core and the pillow filling. Removing that requires high suction combined with filtration that genuinely retains the particles. On a mattress used by several people a day, accumulation happens many times faster than in a household bed.

Do we have to close rooms or take the space out of service?

You do not have to close the building. The team schedules the work room by room and hands each room back in sequence. Areas treated with dust mite extraction can be used immediately once finished. Deep-washed items have a recommended drying window, and the team provides that schedule in advance so facilities can plan the roster correctly.

Do blackout curtains have to be taken down first?

No. Curtains are cleaned in place without being removed from the rail. That saves time and eliminates the risk of damaging the rail or hanging hardware, which is particularly valuable in buildings where curtains are mounted high or are awkward to dismantle.

How is the SIRENA System different from a housekeeping vacuum?

The SIRENA System is engineered in Canada with a 1200-watt Italian cyclonic motor, combined with water filtration and a HEPA filter rated to 0.02 micron. Dust and allergen drawn in are trapped in the water at 100 percent and nothing is blown back into the room — unlike a conventional vacuum, which typically exhausts its finest particles straight back out. That exhaust is why many people feel worse after ordinary vacuuming rather than better.

How often should high-turnover sleeping areas be treated?

On-call rooms, staff rest areas, student dormitories and any space where multiple people sleep in rotation each day should be scheduled more frequently than a normal home — roughly every three to four months. Residences with an allergy or asthma sufferer are typically every four to six months. The team assesses your specific conditions and recommends an interval on the day of service.

Is the service safe for continuously occupied clinical environments?

Yes. The core process is extraction of allergen using water filtration and HEPA, not spraying chemicals into mattresses. The SIRENA System is certified by the Asthma Society of Canada and carries TUV Rheinland certification. The optional disinfection fogging and the aftercare products supplied are selected as appropriate for spaces that remain in continuous use.

Related Services and Reading

• Dust Mite Removal Service — Mattresses, Sofas, Carpets and Curtains With Full Disinfection
• SIRENA System Dust Mite Removal Machine — Water Filtration Plus HEPA
• Disinfection Fogging Service — Viruses, Bacteria and Fungi
• CHEMGENE HLD4H Disinfectant
• WHO — Asthma Fact Sheet
• Department of Disease Control, Ministry of Public Health (Thailand)

Send this to someone who sleeps in an on-call room — and to whoever manages the building they sleep in.

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