Chughtai, A., Seale, H., and MacIntyre, C. (2013). Availability, Consistency and Evidence-base of Policies and Guidelines on the Use of Mask and Respirator to Protect Hospital Health Care Workers: A Global Analysis. BMC Research Notes. 6:216.
The authors examined existing policies and guidelines from the Centers for Disease Control and Prevention, the World Health Organization, three high-income countries, and six low/middle-income countries on mask and respirator use for influenza, SARS, and tuberculosis. They found significant variation in choice of products, applications, and specifications. They encourage joint evaluation of evidence and development of a uniform policy to reduce confusion in healthcare settings.