Work out incubation period distribution instantly with clear inputs, formula shown and shareable results.
Applies the lognormal incubation model: the chosen percentile is the median multiplied by the exponential of the normal deviate times the log standard deviation.
Lognormal percentile
Percentile = median x exp(z x sigma), where z is the standard normal deviate for the required percentile
Incubation periods are right skewed and non-negative, which the lognormal distribution captures well across many infections.
Usually at or beyond the 95th to 99th percentile of the incubation distribution.