Manual of Physical Distancing is a visual assessment of  the challenges of living in the time of Covid -19 illustrating the medical research and spatial recommendations tied to rates of spread of this virus. The goal is to use the visual practices of architecture to provide greater clarity over the spatial implications of addressing and mitigating Covid-19.  Areas of study include rates of transmission, indoor vs outdoor risks, educational spaces, shared spaces of buildings, and public spaces in cities.  This is a dynamic document, of which the most recent version is available  online.  This research work is lead by  Paul Lewis, David J. Lewis and Marc Tsurumaki, in collaboration with Guy Nordenson, and supported in part by Princeton University Funding for Rapid, Novel and Actionable Covid-19 Research Projects.