why it is important to consider health at the global level

What is public health in global level?
First, I will mention the definition of Public Health: the science of protecting and improving the health of communities through education, promotion of healthy lifestyles, and research for disease and injury prevention.

Second, the goals: aim at population-wide health improvement, implying a concern to reduce health inequalities. The United States Association of School of Public Health stipulate that populations can be as small as a local neighbourhood or as big as the entire world.(Association of School of Public Heaalth,2007)

So, public health focus on the health of communities, what is the biggest community? Of course the entire world---globle.

Then its focus is the impact of global interdependence on the determinants of health, the transfer of health risks and the policy response of countries, international organizationsand the many other actors in the global health arena. Its goal is the equitable access to health in all regions of the globe.

Why it is important?

Globalization has linked our health more closely to one another than ever before. The rapid movement of people and food across borders means that a disease can travel from a remote village to an urban hub at breakneck speed. Global public health meets the rising health challenges that transcend national boundaries. The international field encompasses virtually all specializations in public health.

Global Health contributes to the understanding of the extent to which the transfer of health risks changes in nature, direction and impact due to the increased speed, reduced distance and cultural transfer brought about by modern means of transport and communication as well as new forms of economic dependence and interdependence. Not only can infectious disease travel more rapidly thanever before, but so can harmful life styles, pollution, toxic substances and unsafe goods and products. That's the first point.

Second, Global Health contributes to the development of strategies that counteract epidemiological polarization and aim to achieve a balance between supportive global mechanisms and decentralized approaches. As a priority this includes building the capacity of the developing world to govern health in the new global context as well as strengthening the local response to the new social, behavioral,environmental or biological risks to health such as the global HIV/AIDS epidemic, urban violence or bio-terrorist threats.

There are many grand Challenges in Global Health, for example:
To improve childhood vaccines
To create new vaccines
To control insects that transmit agents of disease
To improve nutrition to promote health
To improve drug treatment of infectious diseases
To cure latent and chronic infections
To measure disease and health status accurately and economically in poor countries

In conclusion, Global health research is necessary to remove the various social, cultural, and logistical barriers that confound the well-intentioned efforts of many global health programs. Therefore, research must focus on concerns raised by developing countries, closing not only the gap in health disparities within countries, but also the gap in knowledge between the developed and developing world. Furthermore, research must be sensitive to the culture of a particular community. As the field of global health research continues to grow, our student should pay more attention to globle health.