Science
How Face Shields and Valve Masks Fail to Stop Infectious Droplets, as Shown by Lasers – Gizmodo Australia
A new study using lasers suggests that face shields and masks outfitted with an exhaust valve aren’t particularly great at protecting others from tiny respiratory droplets containing contagious germs like the coronavirus that causes covid-19. These aerosols c…

A new study using lasers suggests that face shields and masks outfitted with an exhaust valve arent particularly great at protecting others from tiny respiratory droplets containing contagious germs like the coronavirus that causes covid-19. These aerosols can spill through and around these types of face equipment, the study found, weakening their potential to keep users from spreading an infection to others.
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