Greater Cairo is the biggest Arab city in population and area, and ranked the seventh globally in terms of population (20 million and 901 thousand, est. 2020), and also representing 20 % of the total population of Egypt. So it’s the most populated cities in Egypt, as well as thousands of people come daily from other governorates to Cairo because of their work inside Cairo or finishing their personal interests or treatment where are many of services and governmental agencies and major hospitals.