Global health is a field of medicine focused on the international spread of disease and the methods and techniques to prevent it. Contagious diseases do not recognize national borders or other arbitrary constraints, so limiting the spread of problems like the Ebola virus requires international efforts. Most global health organizations focus on supporting health around the world, which includes educating the public, providing vaccines, dealing with logistical limitations, and supporting prevention-based services. With a job in this field, you may conduct research, help improve worldwide acceptance of treatments, create strategies for dealing with epidemics, and support efforts to write a plan for meeting global health needs.