Plastic face visors 'ineffective' at trapping respiratory aerosols, researchers find

manchestereveningnews.co.uk:

told the Guardian: “Judging from the results of the simulation, unfortunately the effectiveness of face guards in preventing droplets from spreading from an infected person’s mouth is limited compared with masks." “This is especially true for small droplets of less than 20 micrometres,” he said, adding that all of the much smaller aerosol particles were found to escape through the gap between the face and the face shield."At the same time, it somehow works for the droplets larger than 50 micrometres.”For those people who cannot wear masks, due to underlying respiratory conditions or small children, they can wear face shields as an alternative - but outdoors or in properly ventilated indoor settings.The supercomputer recently found that face.