- The serial interval (SI) is not one of the estimators. It is a parameter required by most of the estimators, and can
- also be estimated by some of them (if not specified).
+ The <a href="https://en.wikipedia.org/wiki/Serial_interval" target="_blank">serial interval (SI)</a> is a parameter
+ required by most of the estimators, and can also be estimated by some of them (if not specified). For the latter, "—"
+ is reported in the "Serial interval" column of the estimates table, and the estimated value is shown next to the
+ <em>R</em><sub>0</sub> result(s) as "(SI = ...)".