Serial interval of novel coronavirus (COVID-19) infections

To estimate the serial interval of novel coronavirus (COVID-19) from information on 28 infector-infectee pairs.

We collected dates of illness onset for primary cases (infectors) and secondary cases (infectees) from published research articles and case investigation reports. We subjectively ranked the credibility of the data and performed analyses on both the full dataset (n = 28) and a subset of pairs with highest certainty in reporting (n = 18). In addition, we adjust for right truncation of the data as the epidemic is still in its growth phase.