When people imagine the day-to-day activities of health care workers they’re usually thinking about the micro level. Common examples of micro-level work include doing certain kinds of mental health or substance abuse treatments in schools, hospitals or even in the military. While micro medical work happens on an individual level, mezzo-level medical work look at groups instead of individuals such as the smallest group family. Since mezzo-level health care work addresses group issues, it is a tool to conduct small institutional, social and cultural changes. Macro-level medical work involves interventions and advocacy on a large scale, affecting communities, provinces or countries. It helps patients via intervening in large systems beyond the access of individuals.