Before revision:  model , where populations differ by their degree of compliance with social distancing policies . Considering the data of the propagation of SARS-CoV-2 in Brazil , where there is a significant stake of the population making their living in the informal economy and thus prone to not follow self-isolation , we assert that if the confinement measures are lifted too soon, namely as much as one week of consecutive declining numbers of new cases, it is very likely the appearance of a second peak  .
After revision:  model . As a novelty, we consider populations that differ in their degree of compliance with social distancing policies . Considering the data of the propagation of SARS-CoV-2 in Brazil , where there is a significant stake of the population making their living in the informal economy and thus prone to not follow self-isolation , we assert that if the confinement measures are lifted too soon, namely as much as one week of consecutive declining numbers of new cases, it is very likely the appearance of a second peak .