A lady talks with an Air Canada employee next to a hand sanitizer station at Toronto's Pearson International Airport for a "Healthy Airport" during the COVID-19 pandemic in Toronto on June 23, 2020. As people around the world remain isolated in their homes, avoiding close contact with others and meticulously sanitizing their hands and surfaces, scientists warn there may be unintended consequences of these necessary pandemic protocols. THE CANADIAN PRESS/Nathan Denette