Before revision:  As a rule of thumb, the optimal size of the sub-populations can be obtained by dividing the total population size by the best estimate of the number of infected individuals at the time of the implementation of this containment strategy .
After revision:  As a rule of thumb, the total population has already left the stochastic regime and the basic reproduction number is not altered by the subdivision. Both effects are quantitatively captured by our theoretical estimates, allowing us to determine their individual contributions to the observed reduction of the peak of the epidemic .