When the Covid-19 pandemic first began, most people focused on the risk of catching the new coronavirus from touching surfaces. Fast-forward to today, and it’s clear that SARS-CoV-2 is most often spread via droplets and aerosols floating in the air. Yet, says Joe Allen of the Harvard T.H. Chan School of Public Health, too much effort and money are still being spent on cleaning as opposed to investing in better indoor ventilation and filtration systems. In this interview, Allen describes how to make buildings healthier in the battle against Covid.

This is the first episode in Knowable’s new video series: Reset: The Science of Crisis & Recovery.

READ MORE: The Fluid Dynamics of Disease Transmission, Annual Review of Fluid Mechanics 2021: https://knowmag.org/30fAT1V

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