许多人不了解公共健康，也没有考虑过公共健康，因为如果运行正常，它是不可见的。如果没有公共卫生，我们都会注意到这种差异并承受后果。与专注于疾病发生后的治疗的医学相反，公共卫生侧重于疾病的预防和优化人群的身体和社会心理状况。因此，公共卫生是最跨学科的，因此是具有挑战性的卫生专业。要很好地实践它，需要具备许多学科的综合知识，包括：分子生物学，基础医学，流行病学，统计学，环境科学，心理学，社会学，人类学，经济学，行政管理，管理，法律，政治和政策，伦理学以及所有临床学科。在实施公共卫生干预措施或程序时，甚至工程，城
Many people don't know of, or think about, public health, because when it works right, it's invisible. If public health wasn?t around, we would all notice the difference and suffer the consequences. As opposed to medicine, which concentrates on the treatment of disease once it has occurred, public health focuses on the prevention of disease and optimizing the physical and psychosocial status of populations. As such, public health is the most interdisciplinary and therefore, challenging health profession. To practice it well requires an integrated knowledge of many disciplines including: molecular biology, the basic medical sciences, epidemiology, statistics, environmental sciences, psychology, sociology, anthropology, economics, administration, management, law, politics and policy, ethics and all the clinical disciplines. Even engineering, urban planning, architecture and social work are critical when it comes to implementing public health interventions or procedures.