Poor indoor air quality can contribute to health problems. Letting in fresh air, keeping air filters changed and using air purifiers can help. skaman306/Getty Images hide caption
indoor air
Classroom in Winston-Salem, North Carolina, United States Mint Images/Getty Images hide caption
Architects say making the office more like the outdoors — with filtered air and good ventilation — will be a priority post-pandemic. This living wall in the Danielle N. Ripich Commons at the University of New England in Biddeford, Maine, is one such approach. Gregory Rec/Portland Press Herald via Getty Images hide caption
University of Oregon scientists used real dust from inside homes around Portland to test the effects of sunlight, UV light and darkness on bacteria found in the dust. Dave G Kelly/Getty Images hide caption