Chronic fatigue syndrome -CFS - is the story here. The filmmaker has it which has prompted her to investigate other sufferers, past outbreaks, medical views, etc. This comes across as a thorough examination of a subject without reaching any conclusions about the cause(s) or even the reality of the disease.
Moving - intentionally so - but the lack of a satisfying resolution was frustrating. We know the the mind can cause paralysis and even death. Could it be causing these problems for these people? We really don't know at this point.
Well done doc.