A new study from the University of East Anglia found that air filtration systems and other technologies designed to make indoor spaces safer do not reduce the risk of picking up viral infections. The researchers looked at evidence from 32 studies conducted in real-world settings and found little support for the idea that these technologies can make air safe from respiratory or gastrointestinal infections. They also found no strong evidence that air treatment technologies are likely to protect people in real-world settings. The study’s lead researcher, Dr. Julii Brainard, said that while there is evidence that air treatment strategies can reduce environmental and surface contamination, they do not stop or reduce illness. The research was funded by the National Institute for Health and Care Research Health Protection Unit in Emergency Preparedness and Response and involved collaborators from several other universities and hospitals. The researchers hope that more studies on air treatment technologies during the Covid pandemic will be published soon to provide a more informed judgment about their value.

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