Many agents/substances used or created at work could harm health. They include chemicals in all their forms, solid, liquid, gaseous including nanoparticles; as well as biological agents such as bacteria, viruses or other microorganisms, that can cause infection, an allergic reaction or are toxic. Biological risks also include the transmission of disease between humans (HIV, Hepatitis, influenza etc.) or between animals and humans. The agents/substances can be in different forms or transmitted in various ways such as dusts, gases or fumes that are breathed in, or liquids, gels or powders that come into contact with eyes, mucous membranes or skin and in some instances can be involuntarily ingested. Finally, some agents may be unintentionally injected or transmitted by animal stings, bites or excreta. Harmful agents/substances can be present in anything from paints and cleaners as well as in water, flour or other dusts, solder fume, air conditioning systems, blood and waste.

Hima Xavier

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