A sweeping new study from Mass General Brigham reveals that classroom air purifiers, once seen as a key defense against illness, may not do enough to stop respiratory viruses. Researchers analyzed air samples from 200 classrooms — half equipped with portable HEPA (high-efficiency particulate air) purifiers and half with “sham” devices lacking filters. While HEPA […] The post Do Classroom Air Purifiers Really Work? New Massachusetts Study Reveals Surprising Results appeared first on He...
