This project attempts to propose an indicator for quantifying the social distance, which unfortunately is a very popular term these days. The results present 8 reasons why this indicator is fit for public extensive use, among which relevance for decision, simplicity, intuitiveness and low error. The results establish the existence of a theoretical threshold value for the Social Distance which once surpassed determines the decrease of the Number of Active (Contagious) Cases. The study of the situation in a number of countries confirms the existence of the threshold, with values within or close to the range theoretically predicted. Although the concept may be refined, the above reasons and the present worldwide situation, including the need to monitor a possible second wave of pandemic, justify a quick adoption in the author’s opinion, considering however the need for further improvements. Download the full text from here.