It is perhaps feasible to get into a MPH program but does that same determination and persistence mean that you will also function well as an epidemiologist in a work environment? I graduated from nursing school. People weren't sure I could do it because of a head injury and physical limitations. Yet I am not certain I can function well as a nurse given cognitive deficiencies that were previously unknown. I don't want to go down another blind alley. How far can determination and persistence really take you?