I am starting the process of my dissertation and I am looking at medical or healthcare waste management in rural Africa. I want to know which direction do I go: formative evaluation where I try to do a need assessment in rural clinics present in rural Africa or do an impact evaluation of past community -based interventions to control infectious diseases as a result of contact with hospital or medical waste at open dumpsites in rural Africa. 

So my question is Are there recent studies done on this aspect and what are possible research gaps. Thanks

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