A recent blog discussed prolonged respirator use and the potential physiological burden that could result from the buildup of CO2 within the respirator facepiece. Heat stress is another potential stress factor that healthcare workers (HCWs) who use personal protective equipment (PPE) and their employers should be aware of in order to recognize the signs and be prepared with the knowledge of how to alleviate the burden. Respirator and Other PPE Use in Warm and Potentially Humid Environments. HCWs working in warm and humid environments often must wear full coverage PPE, including respirators. When responding to disasters that challenge the
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