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Study finds gaps in evidence for air-cleaning technologies to prevent infections
CU Anschutz study finds gaps in evidence for air cleaning technologies designed to prevent respiratory infections
Published today in the Annals of Internal Medicine, the research analyzed nearly 700 studies between 1929 and 2024 on engineering controls such as HEPA filters, UV light, ionizers and advanced ventilation systems designed to reduce infection transmission through indoor air. The researchers are calling for a new generation of studies that evaluate these technologies in real-world environments such as classrooms and hospitals and track actual infections rather than relying on indirect measures like air particle counts. For those buying an air purifier or installing a new ventilation system to reduce illness in homes, schools or workplaces, the researchers recommend choosing technologies that have been independently tested in real-world environments.
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