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Be prepared! Knowing the following before an injury occurs can make a big difference - The location of your first aid station. - Co-workers who are trained in first aid, including CPR. - Emergency phone numbers such as ambulance and doctor. - Who your workplace health and safety representative is.
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Home > Workers > Injury and Illness > What is an Occupational Disease?
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    Working with the WSIBReturn to WorkInjury and Illness

    What is an Occupational Disease?

    Avoiding Occupational Diseases
    Making an Occupational Disease Claim

    An occupational disease is a health problem caused by exposure to a workplace health hazard.

    Your workplace should be healthy for your body and mind. You can help to keep yourself and your workplace healthy by being aware of health hazards in your environment.

    These workplace health hazards can cause an occupational disease:
    • dust, gases, or fumes
    • noise
    • toxic substances (poisons)
    • vibration
    • radiation
    • infectious germs or viruses
    • extreme hot or cold temperatures
    • extremely high or low air pressure
    Learn about these occupational diseases:
    Asbestos-related Diseases (496k, pdf)
    Asthma and Work (439k, pdf)
    Campylobacter (434k, pdf)
    Contact with Blood and Other Body Fluids (445k, pdf)
    Preventing Silicosis (162k, pdf)
    Preventing Workplace Contact Dermatitis (230k, pdf)
    Silicosis (133k, pdf)
    Workplace Contact Dermatitis (501k, pdf)

    Workplace health hazards can cause three kinds of reactions in the body:
    • Immediate or acute reactions, like shortness of breath or nausea, can be caused by a one-time event, (e.g., a chemical spill). These reactions are not usually permanent.
    • Gradual reactions, like asthma or dermatitis (skin rashes), can get worse and persist when you are exposed over days, weeks or months. These reactions tend to last for a longer time.
    • Delayed reactions or diseases that take a long time to develop, like lung cancer or loss of hearing, can be caused by long-term exposure to a substance or work activity. These reactions can be noticed long after the job is over.

    Noise Control and Hearing Conservation Kit
    Avoiding Occupational Diseases







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