Dispersion vs. ControlDispersion vs. Control Kyra Grantz C. Jessica E. Metcalf Justin Lessler NOTE (2020-15-2): Update at bottom based on numbers as of February 15 2020. Despite introductions of the novel coronavirus into 27 countries, as of February 11, 2020, there has been little documented onward transmission outside of China. At the start of the outbreak, the basic reproductive number, \(R_0\), was estimated to be
