“The surface of your flooring makes an enormous difference,” says Alessandra Leri, professor of chemistry and biology at the school and the lead author of the study. “If you have carpets, they function as a reservoir of bacteria.” But no matter the interior floor surface, she says, “shoe soles are a serious vector of transmission of fecal bacteria from the outdoor environment to the indoor environment.”
Shoes track in more than germs
PFAS, the “forever chemicals” so named for how long they linger in the environment and our bodies, are regularly picked up by shoes and used in manufacturing the soles. Lead dust, which can often be stirred up and…
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