{"id":988846,"date":"2026-04-06T18:54:26","date_gmt":"2026-04-06T22:54:26","guid":{"rendered":"https:\/\/aseq-ehaq.com\/?page_id=988846"},"modified":"2026-04-07T13:12:43","modified_gmt":"2026-04-07T17:12:43","slug":"learn","status":"publish","type":"page","link":"https:\/\/aseq-ehaq.com\/index.php\/learn\/","title":{"rendered":"Learn"},"content":{"rendered":"\t\t
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\n\t\t\t\t\t\t\t\t\tLEARN\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Understanding Multiple Chemical Sensitivity (MCS)<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tMCS is a chronic, disabling condition affecting over one million Canadians. Learn what it is, how it impacts daily life, and what the evidence shows \u2014 so you can understand, support, and take action.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tExplore topics<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tSee the data<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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01<\/div>

What Is MCS<\/h4>

Definition, criteria, and why it matters<\/p>

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02<\/div>

Symptoms & Triggers<\/h4>

How MCS presents and what causes reactions<\/p>

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03<\/div>

Diagnosis & Care<\/h4>

Screening tools, treatment, and care barriers<\/p>

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04<\/div>

Statistics<\/h4>

Prevalence data and trends across Canada<\/p>

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05<\/div>

Daily Life Impact<\/h4>

Employment, housing, health, and isolation<\/p>

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06<\/div>

Indoor Air Quality<\/h4>

VOCs, source control, and safer spaces<\/p>

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07<\/div>

COVID-19 & MCS<\/h4>

Pandemic impacts and lessons learned<\/p>

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08<\/div>

Myths & Stigma<\/h4>

Challenging misconceptions with evidence<\/p>

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\n\t\t\t\t\t\t\t\t\t01 \u2014 WHAT IS MCS\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A Chronic Condition Triggered by Chemical Exposure<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tMultiple Chemical Sensitivity (MCS) is a chronic health condition and recognized disability. People with MCS experience symptoms when exposed to volatile organic compounds (VOCs) and other chemicals found in everyday products \u2014 including fragrances, cleaning agents, building materials, and personal care products.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tMCS is an acquired condition. It can develop after a single significant chemical exposure \u2014 such as a pesticide application, chemical spill, or renovation \u2014 or after repeated lower-level exposures over time. Once initiated, it typically persists, and continued exposure can increase sensitization and broaden the range of substances that trigger reactions.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tRecognition is growing. In June 2025, the American Medical Association adopted policy formally recognizing that fragrance sensitivity and MCS may constitute disabling conditions. The UN Committee on the Rights of Persons with Disabilities has also explicitly referenced MCS in its Concluding Observations to Canada.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tRead the full page<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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1999 Consensus Criteria<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\tThe internationally recognized framework for identifying MCS:\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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  1. Reactions are reproducible with repeated chemical exposure<\/li>
  2. The condition is chronic<\/li>
  3. Symptoms occur at low levels of exposure<\/li>
  4. Symptoms improve when exposure is removed<\/li>
  5. Reactions occur to multiple, unrelated substances<\/li>
  6. Multiple organ systems are affected<\/li><\/ol>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \ud83e\udde0<\/div>Brain &
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    \ud83e\udec1<\/div>Respiratory<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \u2764\ufe0f<\/div>Cardiovascular<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\udec3<\/div>Gastrointestinal<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udcaa<\/div>Musculoskeletal<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\ude79<\/div>Skin<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udc41\ufe0f<\/div>Eyes<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udee1\ufe0f<\/div>Immune<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t\t\t\t\t02 \u2014 SYMPTOMS & TRIGGERS\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Recognizing MCS: Triggers and Symptoms<\/h2>

    For people living with MCS, exposure to triggering substances reliably produces symptoms across multiple body systems. While profiles vary, continued exposure typically increases sensitization \u2014 meaning lower levels of exposure provoke reactions, and the range of triggering substances widens.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Common Triggers<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \ud83c\udf38<\/div>Fragrances & Perfumes<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\uddf4<\/div>Personal Care Products<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\uddf9<\/div>Cleaning Products<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\uddfa<\/div>Laundry Products<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83c\udfd7\ufe0f<\/div>Building Materials<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udecb\ufe0f<\/div>New Furniture<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udeac<\/div>Smoke Exposure<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83e\uddea<\/div>Pesticides<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\udd6f\ufe0f<\/div>Candles & Incense<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83d\ude97<\/div>Vehicle Exhaust<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \ud83c\udf7d\ufe0f<\/div>Foods & Additives<\/span><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Symptoms by Body System<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \ud83e\udde0<\/div>

    Central Nervous<\/h4>

    Heightened sense of smell, migraines, brain fog, difficulty concentrating, memory challenges, dizziness, fatigue, insomnia, anxiety<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83e\udec1<\/div>

    Respiratory & Immune<\/h4>

    Coughing, wheezing, shortness of breath, sinus pain, sore throat, swollen glands, flu-like symptoms<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Cardiovascular<\/h4>

    Palpitations, rapid or irregular heartbeat, blood pressure changes, chest pain or pressure, cold extremities<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83e\udec3<\/div>

    Gastrointestinal<\/h4>

    Nausea, heartburn, bloating, abdominal pain, constipation and\/or diarrhea<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udcaa<\/div>

    Musculoskeletal<\/h4>

    Joint pain, muscle pain, twitching, spasms, weakness<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83e\ude79<\/div>

    Skin<\/h4>

    Flushing, hives, eczema, rashes, itching<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udc41\ufe0f<\/div>

    Eyes<\/h4>

    Red or watery eyes, eye discomfort or pain, disturbed vision<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \ud83d\udd2c<\/div>

    Genitourinary<\/h4>

    Urinary urgency or frequency, bladder spasms<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tExplore symptoms & triggers<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t\t\t\t\t03 \u2014 DIAGNOSIS & CARE\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Navigating Diagnosis and Treatment<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    \n\t\t\t\t\t\t\t\t\tThere is no single laboratory test for MCS. Diagnosis is based on clinical assessment \u2014 including medical and exposure history, physical examination, and appropriate investigations to rule out other conditions.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Validated screening tools exist, including the BREESI<\/strong> (Brief Environmental Exposure and Sensitivity Inventory) and the QEESI<\/strong> (Quick Environmental Exposure and Sensitivity Inventory), both widely used for clinical screening and case identification.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t\t\t\t\tDespite this, many healthcare providers receive little training on MCS. The condition is frequently missed, misunderstood, or attributed to psychological causes \u2014 delaying recognition, care, and access to accommodations.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    There is currently no cure. The most effective approach is ongoing management through exposure reduction<\/strong> \u2014 systematically identifying and minimizing contact with triggering substances across the environments where people spend the most time.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Care Pathway<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    1<\/div>
    Screen<\/strong>
    Ask about chemical exposures and triggers<\/span><\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    2<\/div>
    Assess<\/strong>
    Use BREESI\/QEESI tools, document history<\/span><\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Document<\/strong>
    Record MCS, triggers, and functional impact<\/span><\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Reduce Exposure<\/strong>
    Source control and fragrance-free practices<\/span><\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Support & Follow Up<\/strong>
    Accommodation, referrals, ongoing assessment<\/span><\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tDiagnosis, treatment & care<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    MCS is not rare. It is under-recognized. When the evidence is followed, the path forward becomes clear.<\/blockquote>
    \u2014 Resilience 2025 International Conference on MCS<\/div> <\/div><\/section> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    \n\t\t\t\t\t\t\t\t\t04 \u2014 STATISTICS & PREVALENCE\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    MCS by the Numbers<\/h2>

    Canada is one of the few countries that systematically tracks MCS prevalence through national surveys. The Canadian Community Health Survey (CCHS), conducted by Statistics Canada, provides two decades of data on this growing public health concern.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    1,130,800<\/span><\/div>
    Canadians diagnosed with MCS<\/div>
    3.5% of the population aged 12+<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    72<\/span>%<\/span><\/div>
    Are women<\/div>
    Women significantly overrepresented<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    251<\/span>K<\/span><\/div>
    In Qu\u00e9bec alone<\/div>
    3.4% of Quebec's population<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Rising Prevalence: 2000\u20132020<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tMCS prevalence among Canadians has nearly doubled over two decades.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    2000<\/div>
    <\/div><\/div>
    1.9%<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    2005<\/div>
    <\/div><\/div>
    2.4%<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    2010<\/div>
    <\/div><\/div>
    2.8%<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    2014<\/div>
    <\/div><\/div>
    3.1%<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    2020<\/div>
    <\/div><\/div>
    3.5%<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tSource: Statistics Canada, Canadian Community Health Survey (CCHS). Healthcare-professional diagnosed cases, population aged 12+.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t

    Note:<\/strong> MCS prevalence data was not collected nationally for 2023 and 2024, as several provinces opted out of the relevant survey questions. Starting in 2025, Statistics Canada has confirmed that MCS questions will be included annually in every province \u2014 ensuring uninterrupted national data going forward.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t\t\t
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    \n\t\t\t\t\t\t\t\t\t
    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tExplore all statistics<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t05 \u2014 IMPACTS ON DAILY LIFE\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    How MCS Changes Everyday Living<\/h2>

    MCS creates barriers to environments most people take for granted \u2014 workplaces, schools, healthcare settings, and public spaces. Without accommodations, exclusion can be severe and far-reaching.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t
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    \n\t\t\t\t\t

    Employment Impact<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    41%<\/div>
    <\/div>
    People with MCS
    not working<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tvs\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    24%<\/div>
    <\/div>
    General population
    not working<\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tSource: Statistics Canada, CCHS 2020\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    3\u00d7<\/div>
    More likely to report poor health<\/div>
    Canadians with MCS compared to the general population (CCHS 2015\u20132016)<\/div> <\/div>

    People with MCS also face higher barriers to healthcare access \u2014 including service unavailability, high costs, lack of a regular provider, and difficulty accessing specialist services.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t

    Areas of Life Commonly Affected<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83d\udcbc<\/div>
    Work & Income<\/h5>

    Workplace access, employment, meetings<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83c\udfe0<\/div>
    Housing<\/h5>

    Finding safe, low-chemical living spaces<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83c\udfe5<\/div>
    Healthcare<\/h5>

    Accessing clinics, hospitals, appointments<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83d\udcda<\/div>
    Education<\/h5>

    Schools, libraries, community centres<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83e\udd1d<\/div>
    Relationships<\/h5>

    Stigma, misunderstanding, social isolation<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83d\udcb0<\/div>
    Financial<\/h5>

    Costs of safer products and environments<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t
    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tUnderstand the full impact<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t06 \u2014 INDOOR AIR QUALITY\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t
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    \n\t\t\t\t
    \n\t\t\t\t\t

    The Air Inside Matters<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tPeople spend approximately 90% of their time indoors. The quality of indoor air \u2014 in homes, workplaces, schools, and healthcare settings \u2014 has a direct impact on health, particularly for people with MCS.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tVolatile organic compounds (VOCs) evaporate into the air from common products and materials. Many indoor environments contain multiple VOC sources, creating cumulative exposures that significantly affect air quality.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t

    Source control<\/strong> \u2014 choosing fragrance-free, lowest VOC emission, and least toxic products \u2014 is the most effective strategy. This eliminates chemical exposures at their origin, rather than relying on ventilation after chemicals have been released.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tImproving indoor air quality benefits everyone, not only those with MCS. It is a public health strategy that supports healthier and more accessible spaces.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t
    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tExplore indoor air quality<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Key Indoor Exposure Sources<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83e\uddf9<\/div>
    Cleaning Products<\/h5>

    Bleach, sprays, disinfectants<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83c\udf38<\/div>
    Fragranced Products<\/h5>

    Air fresheners, candles, plug-ins<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83c\udfa8<\/div>
    Building Materials<\/h5>

    Paint, adhesives, flooring<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83d\udecb\ufe0f<\/div>
    Furniture<\/h5>

    Off-gassing from new items<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83d\udd25<\/div>
    Combustion<\/h5>

    Gas stoves, fireplaces, heaters<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t
    \ud83c\udf44<\/div>
    Mould<\/h5>

    Moisture-related contaminants<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t07 \u2014 COVID-19 & MCS\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    The Pandemic's Impact on People with MCS<\/h2>

    COVID-19 created both new barriers and unexpected insights for people living with MCS. A cross-sectional study by ASEQ-EHAQ, published in JMIR Formative Research<\/em> (2024), surveyed 119 Canadians with MCS during the first year of the pandemic.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t
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    \n\t\t\t\t\t\t\t\t\t\u26a0\ufe0f\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
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    Increased Chemical Exposure<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tPandemic disinfection practices significantly increased exposure to sanitizers and cleaning products entering living environments.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
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    \n\t\t\t\t\t\t\t\t\t\ud83c\udfe5\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Healthcare Barriers<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tSatisfaction with in-person physician visits decreased significantly; telephone and online consultations were viewed more positively.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t\ud83d\ude37\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Reduced PPE Stigma<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\tWearing protective equipment \u2014 already used by many with MCS \u2014 became normalized, reducing a longstanding source of stigma.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Social Isolation and Understanding<\/h3>

    People with MCS experienced increased social isolation during the pandemic. However, there was an unexpected benefit: participants reported greater understanding from family members and reduced stigma around protective measures.<\/p> <\/div>

    Lessons for the Future<\/h3>

    The pandemic demonstrated that when environments are modified and accommodations offered widely \u2014 remote work, improved ventilation, awareness of cleaning practices \u2014 they benefit not only people with MCS but the broader population. These lessons should inform future accessibility policy.<\/p> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

    \n\t\t\t\t
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    \n\t\t\t\t\t\t\t\t\t
    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tRead more about COVID-19 & MCS<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
    \n\t\t
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    \n\t\t\t\t
    \n\t\t\t\t\t\t\t\t\t08 \u2014 MYTHS & STIGMA\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
    \n\t\t\t\t
    \n\t\t\t\t\t

    Challenging What People Think They Know<\/h2>

    Despite growing evidence and international recognition, MCS faces significant stigma. A 2025 qualitative study involving ASEQ-EHAQ identified four key drivers: psychological misattribution, healthcare gaps, policy resistance, and misleading product labelling. Here are the facts.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\t

    Myth<\/span> \"MCS is psychological.\"<\/h4>
    +<\/div> <\/div>
    Evidence<\/div>

    MCS is not a psychological condition. Research has identified neurobiological, immunological, and toxicological mechanisms. A 2023 comprehensive review in Neuroscience and Biobehavioral Reviews<\/em> documented evidence across multiple biological domains. Attributing MCS to psychological causes is not supported by the current evidence base and contributes to dismissal and delayed care.<\/p> <\/div> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t

    Myth<\/span> \"People with MCS are just sensitive to smells.\"<\/h4>
    +<\/div> <\/div>
    Evidence<\/div>

    MCS is a medical condition in which chemical exposures trigger physiological reactions across multiple body systems. It is not a preference or a heightened sense of smell. The distinction between disliking an odour and experiencing measurable, reproducible symptoms is critical to understanding and respecting this disability.<\/p> <\/div> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t

    Myth<\/span> \"MCS only affects a small number of people.\"<\/h4>
    +<\/div> <\/div>
    Evidence<\/div>

    Over 1.13 million Canadians have been diagnosed with MCS \u2014 that is approximately 1 in 34 people. Self-reported chemical sensitivity rates range from 6.5% to 9% internationally. Prevalence in Canada has been steadily increasing for over two decades.<\/p> <\/div> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    \n\t\t\t\t\t

    Myth<\/span> \"Accommodations for MCS are unreasonable or too costly.\"<\/h4>
    +<\/div> <\/div>
    Evidence<\/div>

    Many effective accommodations are simple and low-cost: switching to fragrance-free products, adjusting cleaning practices, improving ventilation, and offering scheduling flexibility. These changes benefit indoor air quality for everyone \u2014 not only people with MCS.<\/p> <\/div> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t
    \n\t\t\t\t\t

    Myth<\/span> \"If the air smells clean, it is clean.\"<\/h4>
    +<\/div> <\/div>
    Evidence<\/div>

    Many harmful VOCs are odourless or present below the threshold of smell. The absence of a noticeable odour does not mean air quality is safe. Source control \u2014 eliminating chemical emissions at their origin \u2014 is the most reliable approach to healthier indoor air.<\/p> <\/div> <\/div><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    \n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tExplore myths & misconceptions<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    EXPLORE MORE<\/div>

    Continue Learning<\/h2>

    Each topic above has a full dedicated page with in-depth information, resources, and references. As new evidence emerges, content is updated to reflect the latest developments.<\/p><\/div> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Learn<\/h4>

    Understand MCS and its impact<\/p><\/a> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Live & Manage<\/h4>

    Practical steps for daily living<\/p><\/a> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Resource Hub<\/h4>

    Tools, guides, and downloads<\/p><\/a> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Take Action<\/h4>

    Advocate, support, and contribute<\/p><\/a> \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Everyone deserves the right to know.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

    LEARN Understanding Multiple Chemical Sensitivity (MCS) MCS is a chronic, disabling condition affecting over one million Canadians. Learn what it is, how it impacts daily life, and what the evidence shows \u2014 so you can understand, support, and take action. Explore topics See the data 01 What Is MCS Definition, criteria, and why it matters…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_canvas","meta":{"_angie_page":false,"footnotes":""},"class_list":["post-988846","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/pages\/988846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/comments?post=988846"}],"version-history":[{"count":12,"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/pages\/988846\/revisions"}],"predecessor-version":[{"id":988884,"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/pages\/988846\/revisions\/988884"}],"wp:attachment":[{"href":"https:\/\/aseq-ehaq.com\/index.php\/wp-json\/wp\/v2\/media?parent=988846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}