First answer from Google: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191274/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191274/ The research includes cl

First answer from Google: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191274/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191274/ The research includes cloth masks, medical masks, and respirators in community and medical settings. Conclusion: “ 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.”