As COVID-19 began going viral in early 2020, a 1918 photograph of seven people wearing masks, standing on a train platform in Mill Valley went viral as well. A striking image at any time, this photo resonates deeply with us ever more in the time of COVID.

Listen to a new episode of The History Mill as we dig into the story behind the image, the man who took it, why and how it became so popular, and the problems of ownership and attribution that come with historical photographs.