Before revision:  All these results, together with an investigation of the effectiveness of authorities intervention, as in the case of applying contact restriction measures, documents scientifically their worthiness  .
After revision:  All these results, together with an investigation of the effectiveness of authorities intervention, as in the case of applying contact restriction measures, documents scientifically their worthiness , while they also demonstrate the limits for which herd immunity holds safely. Finally, the model has been compared against real epidemic data in the case of Greece, which imposed restrictive measures consistently and in time .