During the pandemic researchers who focus on the microbiology of built environments suddenly found themselves at the center of attention. Understanding how SARS-CoV-2 may be spreading indoors became incredibly important to ensure we can operate indoors in a safe manner. We now know that SARS-CoV-2 transmits through the air in droplets and as particles, and this information has helped us to provide comprehensive advice on how people should manage the indoor environment. Last year my guests published a review in mSystems: 2019 Novel Coronavirus (COVID-19) Pandemic: Built Environment Considerations To Reduce Transmission. This is published with co-authors David A. Coil, Mark Fretz, and Jonathan A. Eisen. This paper was the most downloaded article for mSystems in 2020, and was in the top ten most downloaded articles across all ASM journals. This is maybe not surprising based on the topic covered. Guests: Leslie Dietz, Patrick Horve, Kevin Van Den Wymelenberg Links mentionoed: Microbes and social equity working group Visit msystems.asm.org to read articles and/or submit a manuscript.