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COVID-19 healthcare personnel (HCP) use personal protective equipment (PPE; ie, isolation gowns, eye protection, facemasks and respirators) to safely perform their medical duties. However, PPE creates a microenvironment around the skin due to a higher thermal resistance and lower water vapour permeability of the materials being used compared with the normal clothing ensemble of HCP.1 Consequently, heat loss capacity via the skin surface is greatly reduced. The metabolic energy expenditure from regular working activities could, therefore, not be completely lost to the surrounding environment, leading to heat strain, thermal discomfort, excessive sweating, faster dehydration and an increased cardiovascular strain. To accommodate heat loss, blood redistribution from central organs and skeletal muscle to the skin occurs, which will further exacerbate the physiological strain, ultimately leading to shorter work tolerance times and a reduced physical …
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