Global health has in recent years drawn increasing scientific, political and popular attention not only due to global epidemics themselves,but also because of the social activities and environmental conditions that shape health threats and influence those who are affected. Factors that contribute to the emergence and increase of health threats include development patterns which create conditions such as overcrowded cities with poor sanitation, increasing human movement throughout the world, and
alteration of the environment and climate. Those who are most vulnerable to evolving health crises tend to be the poor and marginalised.Most recently,global healthwas internationally recognized as an integral part of the UN Millennium Development Goals (MDGs). This international emphasis on continuing and global health issues has generated a multitude of research, conventions and conferences including an UN-sponsored conference on sustainable global health.