People’s social lives, for the most part, have moved outside during this pandemic. Compared to being indoors, there is much less risk of catching or spreading the coronavirus at a park or while sitting at a table under the sun. Unfortunately, many of life’s necessities – like school, work, errands and buying groceries – simply have to be done indoors. But there are some easy ways to make indoor spaces safer, and some things to look for that can tell you when a room is a risky place to be.

Shelly Miller, a professor of engineering at the University of Colorado, Boulder, explains how much airflow you need to reduce the spread of the virus, how to measure if a room is getting enough fresh air and how to use air filters to make a room safer if you can’t open a window.

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Daniel Merino

Junior Editor: Science, Health, Environment

Open windows are the simplest way to increase air flow in a room. Justin Paget / Digital Vision via Getty Images

How to use ventilation and air filtration to prevent the spread of coronavirus indoors

Shelly Miller, University of Colorado Boulder

Good ventilation can reduce the risk of catching coronavirus. An environmental engineer explains how to know if enough outside air is getting into a room and what do to if ventilation is bad.

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