Final answer:
Public health efforts such as vaccinations and increased hand-washing can be traced back to factors like teaching hygienic practices, government funding of sanitation systems, and medical discoveries.
Step-by-step explanation:
Advances in public health, such as vaccinations and increased hand-washing, can be traced back to various factors. First, public health officials taught hygienic practices to mothers and encouraged healthier behaviors like less smoking. Second, government funding of public sanitation systems and storm sewers helped prevent the transmission of diseases. Lastly, medical discoveries and incentives for private inventors also contributed to the development of health care quality efforts. For instance, scientists developed immunizations for diseases like diphtheria which prevent illness spread to others as well as benefitting the person immunized.