Neglected tropical diseases (NTDs) affect people in the bottom billion poorest in the world. These diseases are concentrated in rural areas. conflict zones and urban slums in Africa and other tropical areas. While the World Health Organization recognizes seventeen priority NTDs. https://wxbmqm2qx7v9.blog2freedom.com/34914805/the-development-of-a-secure-internet-protocol-ip-network-based-on-asterisk-private-branch-exchange-pbx