INTRODUCTION
                     The World Health Organization (WHO) is a 
                        specialized , non political , health agency of the 
                        United Nations.
                     The headquarters is located in Geneva , 
                        Switzerland.
                     In 1946 , the constitution was drafted by the 
                        “Technical Preparatory Committee” under the 
                        chairmanship of Rene Sand.
                     It was approved in the same year by an 
                        International Health Conference of 51 nations in 
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                        1948. 
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             WHO was established on 7  April , 1948.
             Every year 7th April is celebrated as “World Health 
              Day”.
             A World Health day theme is chosen each year to 
              focus attention on a specific aspect of public 
              health. 
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                   OBJECTIVE
                  The objective of the WHO is "the attainment by all people's of 
                   the highest level of health" which is set out in the preamble of 
                   the Constitution.
                  The current objective of WHO is the attainment by all people 
                   of the world a level of health that will permit them to lead a 
                   socially and economically productive life.
                  The preamble of the Constitution states : 
                     "Health is a state of complete physical, mental and social 
                       well-being and not merely the absence of disease or 
                       infirmity. 
                     The enjoyment of the highest attainable standard of health 
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                       is one of the fundamental rights of every human being 
                   985 without distinction of race, religion, political belief, 
                       economic and social condition. 
                                       The health of all peoples is fundamental to the attainment of 
                                          peace and security and is dependent upon the fullest 
                                          cooperation of individuals and States.
                                       The achievement of any State in the promotion and protection 
                                          of health is of value to all. Unequal development in different 
                                          countries in the promotion of health and control of disease, 
                                          especially communicable disease. is a common danger. 
                                       Unequal development in different countries in the promotion of 
                                          health and control of disease, especially communicable disease. 
                                          is a common danger. 
                                       Healthy development of the child is of basic importance; the 
                                          ability to live harmoniously in a changing total environment is 
                                          essential to such development. 
                                       The extension to all people of the benefits of medical, 
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                                          psychological and related knowledge is essential to the fullest 
                                          attainment of health. 
                                   Informed opinion and active cooperation on the part of the public are of the 
                                       utmost importance in the improvement of the health of the people. 
                                   Governments have a responsibility for the health of their peoples which can 
                                       be fulfilled only by the provision of adequate health and social measures".
                               The WHO is unique among the UN Specialized Agencies in that it has its own 
                                constitution, own governing bodies, own membership and own budget. It is part 
                                of, but not subordinate to, the United Nations. 
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                                                Park . K , Park Textbook of Preventive And Social Medicine , 25  ed , 2019 , 982-985