Although it may feel like we're in uncharted territory, New York City has been here before. The 1918 influenza epidemic shuttered businesses, emptied once-crowded subways, and sidewalks, and introduced the concept of social distancing to an entire generation of New Yorkers. As we all hunker down in the name of public health, take a look back at the New York City of 1918 and remember this too shall pass.