Lancet and funded by the World Health Organization (WHO).While the WHO has recently issued guidance over use of masks, the Lancet study found them equally effective in preventing the virus transmission. “Face mask use could result in a large reduction in risk of infection with stronger associations with N95 or similar respirators compared with disposable surgical masks or similar such as reusable 12-16-layer cotton masks," the study said, adding that eye protection also was associated with less infection.According to doctors, a face shield was initially designed for use by healthcare workers in hospitals to prevent splashes of liquid on their face while working with patients and equipment, but has now become common in society.“A face mask.