It has been said that cleanliness is next to godliness, but the constant disinfecting and scrubbing of our homes, offices and public spaces during the coronavirus pandemic has taken these seemingly virtuous efforts to a whole new level. COVID-19 is now understood to spread primarily through close contact with infected people, rather than contaminated surfaces, but that hasn’t stopped consumers from snapping up cleaning products that promise to kill 99% of germs. Trying to eliminate all bacteria, including those that are beneficial to us, can lead to autoimmune disorders, warns Rob Dunn. The professor of Applied Ecology at North Carolina State University and author of: “Never Home Alone: From Microbes to Millipedes, Camel Crickets, and Honeybees, the Natural History of Where We Live,” explains how we can be more intentional about our interactions with the living world (indoors and outdoors) and better understand its influence on our well-being.