Earlier novel coronavirus (SARS and MERS-CoV) outbreaks found evidence for substantialheterogeneity in reproductive numbers between individuals (Cauchemez et al. 2016; Bauchet al. 2005; Chowell et al. 2004). In our analysis, we assume that there is little heterogeneityin reproductive numbers and this assumption may change our estimated reproductivenumber. Additionally, estimates tend to be reduced as case information accumulates,though control measures may also be introduced during these periods. Our estimate of may also reflect the dynamics of surveillance effort and reporting rather than just thedynamics of the epidemic.