For an Effective Confinment against CORONA-Virus: Impact Study Dr Benia El-Hadj, Director of the URNN carried out a study on the interaction of people infected with CORONA Virus when they are moving in their city or residential area, even if 80% of the inhabitants are confined. The study made it possible to bring out the number of interactions of one person with the rest of the population present outside whether it is in the case where the latter is mobile or fixed. The study takes into account different social distances and deals with all the wilayas in the country according to their population density. Interesting results are deduced, in relation to the efficiency of confinement. Tableau_Taux Occupation_effectif_National_Classement_TauxUrbanisation Tableau_Taux Occupation_effectif_National_Classement_Code Wilaya Tableau_Taux Occupation_effectif_National_Classement_Denstié_Effective Estimation_Contagion_Final