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February 28, 2023
New air purifiers filter at least 90% of COVID-carrying particles, researchers say
An army of do-it-yourselfers is trying to clear the air of COVID-19. One group at the University of California, San Diego, is building 250 homemade air purifiers for classrooms and labs around campus, and they say their box-style purifier filters at least 90% of the particles that carry the virus.
The Corsi-Rosenthal boxes, named for the two men who created the purifiers, are made up of four air filters on the sides. As air flows in, an electric fan on top draws out the purified air.
"The virus, if it's there, will get trapped in the filter material," said Kim Prather, professor at the Scripps Institution of Oceanography at UC San Diego.
She studies microscopic particles called aerosols and has been a key voice in spreading the message that good ventilation and filtration are important in the fight against COVID-19.
Research shows an infected person can spread the virus through aerosols that float through a room and, like cigarette smoke, build up over time in poorly ventilated spaces.
