What is Public Health?
American Public Health Association defines public health as is "promotes and protects the health of people and the communities where they live, learn, work and play." This has been active for more than a century, and has made a significant impact on human life. Those active in public health have stopped the pandemic in 1918, ebola epidemic in Africa, SARS epidemic in 2002, and many other such crisis events. Additionally, they have stopped the spread of devastating diseases such as polio and measles with the development of vaccines. Because of active public health developments, the average human life span has lengthened