Comparing Face Coverings in Controlling Expired Particles Surgical, N95 Masks Block Most Particles (IMAGE)
Caption
Laboratory tests of surgical and N95 masks by researchers at UC Davis show that they do cut down the amount of aerosolized particles emitted during breathing, talking and coughing. Here, Prof. Chris Cappa tests a mask by reading a prepared text in front of a machine that collects and counts particles in expired air.
Credit
Christopher Cappa, UC Davis
Usage Restrictions
May be used with acknowledgement.
License
Licensed content