As schools spend millions on air purifiers, experts warn of overblown claims and harm to children

By | May 3, 2021
Last summer, Global Plasma Solutions wanted to test whether the company’s air-purifying devices could kill covid-19 virus particles but could find only a lab using a chamber the size of a shoebox for its trials. In the company-funded study, the virus was blasted with 27,000 ions per cubic centimeter.