Consider when being asked to wear masks:
"This study is the first RCT of cloth masks, and the results caution against the use of cloth masks. This is an important finding to inform occupational health and safety. Moisture retention, reuse of cloth masks and poor filtration may result in increased risk of infection."
Results: "An analysis by mask use showed ILI (RR=6.64, 95% CI 1.45 to 28.65) and laboratory confirmed virus (RR=1.72, 95% CI 1.01 to 2.94) were significantly higher in the cloth masks group compared with the medical masks group. Penetration of cloth masks by particles was almost 97% and medical masks 44%."
From: "A cluster randomised trial of cloth masks compared with medical masks in healthcare workers"