Table of Contents Abbreviations 1-2; Introduction 3-6; Part I: WHO: An International Organization; Chapter 1: Formation of WHO: An Evolution through Various Steps 7-14; 1.1 International Sanitary Conferences; 1.2 Office International d'HygienePublique; 1.3 Health Organization of the League of Nations; 1.4 The Technical Preparatory Committee and the International Health conference of 1946; 1.5 The World Health Organization; Chapter 2: WHO: Objectives, Powers and Functions of WHO under the Constitution 15-20; Chapter 3: WHO as a specialised agency of the United Nations 21-26; 3.1 Definition and characteristics of UN specialised agencies; 3.2 Implications for the WHO: relations between the WHO and the UN; Chapter 4: Ever Expanding Role of WHO in view of various declaration 27-34; 4.1 UDHR, 1948; 4.2 ICESCR,1966; 4.3 CERD,1965; 4.4 CEDAW,1979; 4.5 CRC, 1989; 4.6 Alma Ata Declaration, 1978; 4.7 Ottawa Charter,1986; 4.8 Adelaide Recommendation on Health Public PolicY,1998; 4.9 World Health Declaration, 1998; 4.10 Bangkok Charter 2005; 4.11 International Health Regulations, 2005; Part II : Missions I Mandates of WHO; Chapter 5 : A Broad mandate for the WHO (Various Documents) 35-47; 5.1. The WHO Constitution; 5.1.1 Health as per the WHO Constitution; 5.1.2 The objective of WHO: Health for All; 5.1.3 Health for All Strategy (HFA); 5.2. The Corporate strategy; Chapter 6: WHO on the track of United Nations' goals: the Millennium Development Goals 48 -53; 6.1 The Millennium Development Goals; 6.2 WHO's role in the achievement of the Millennium Development Goals; 6.2 .1 Economic development and health; 6.2.1.1 Health as a determinant of economic development; 6.2.2 The commitment and action of the WHO to the achievement of the Millennium Development Goals; 6.2.3 Strategy and Action of the WHO to achieving the MDGs; Part III: Programs, Projects and Achievements of WHO; Chapter 7: Diseases 54- 58; Chapter 8: Nutrition 59- 65; Part IV: WHO: An analysis; Chapter 9 : WHO: A Look to the Future 66- 83; 9.1 The World Health Organization : Reform; 9.1.1 Identification of areas of challenges; 9.1.2 Proposed solutions to meet identified challenges; Chapter 10: A Critical Appraisal to the World Health Organization; Conclusion; Bibliography.