There is a difference between moving to a country and establishing yourself as a physician, and going on medical missions. As a DO student, you will likely be going on medical missions trips (unless you are trying to set up internetional elective in places like London). If you are looking to do medical missions work in 3rd world countries, there is no resistance whatsoever to taking an osteopathic medical student. This is also the same for osteopathic physicians when using most NGO (non-government organizations) to do medical missions trips. I recently returned from Ghana, and next year may have to opportunity to travel to China, Ghana (again), India or Dubai. Being an osteopathic physician will have no bearing on whether I will be able to go.