Public health is concerned with overall health of a group of people . Public health is concerned with prevention of disease , improve longevity and promoting health through society , organization , trust , communities , government  . Environmental health , social health , behavioral health , occupational health , regional health and community health are important fields related to public health .

                    Vaccination programs and Health awareness speeches are examples of public health measures . In Vaccination programs and Health awareness speeches , main importance is given to prevent a disease rather than curing a disease . Sometimes some projects in the community undertaken by welfare society , trust , organization , community to cure the disease in the community ( Example : -  to cure the problems of eye in the community )