110年 - 110長庚大學_碩士班招生考試_護理學系︰內外科護理學#101456

The pandemic of COVID-19 is growing, and a shortage of masks and respirators has been reported globally. Policies of health organizations for healthcare workers are inconsistent. The findings of this systematic review of randomized controlled clinical trials showed that:
In the community, masks appeared to be eftective with and without hand hygiene, and both together are more protective. Randomised controlled trials in health care workers showed that respirators, if worn continually during a shift,were effective but not if worn intermittently. Medical masks were not eflective,and cloth masks even less effective. When used by sick patients randomised controlled trials suggested protection of well contacts. 

The study suggests that community mask use by well people could be beneficial, particularly for COVID-19, where transmission may be pre-symptomatic. The studies of masks as source control also suggest a benefit, and may be important during the COVID-19 pandemic in universal community face mask use as well as in health care settings. Trials in healthcare workers support the use of respirators continuously during a shift. This may prevent health worker infections and deaths from COVID-19, as aerosolisation in the hospital setting has been documented.
Source: MacIntyre, C. R., & Chughtai, A. A. (2020). A rapid systematic review of the efficacy of face masks and respirators agains st coronaviruses and other respiratory transmisible viruses for the community, healthcare workers and sick patients. International jowrnal of mursing studies, /08, 101629.