Before revision:  Our proposed strategy involves dividing cities and regions in countries and implementing containment at the level of such sub-populations . Since our analysis is based on small numbers (with the relevant data taken from the reported infection cases in Germany on 17 March 2020), it also means that it is doubly beneficial to impose drastic isolation measures for relatively small communities (villages, cities, parts of large cities) early on even if it seems disproportionate at the time , to forego the likely need for future drastic measures .
After revision:  Our proposed strategy involves dividing cities and regions in countries and implementing containment at the level of such sub-populations within which, while social distancing is practised as much as possible to reduce the contact rate, a relatively normal lifestyle is maintained. 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 , to forego the likely need for future drastic measures .