This study led by researchers in the UK finds that face shields do not give high levels of protection against external droplet contamination.
The researchers compared 13 styles of face shields in controlled laboratory settings, using a “coughing machine” that ejected fluorescent drops onto manikin heads.
Among the findings:
Early in the COVID-19 pandemic, some argued that face shields offered a high degree of protection, were comfortable, and did not hinder communication. However, the researchers say they could not confirm that face shields consistently offered high protection to wearers. They added that their findings show why both laboratory and real-world evidence are needed in assessing the utility of any personal protective equipment.Read More >>