Original sentence: Although easy to demonstrate in laboratory conditions with monkeys16,17,18, there has never been a documented case of airborne transmission in human epidemics.As illness progresses, bodily fluids from diarrhea, vomiting, and bleeding represent an extreme biohazard.Based on the limited number of cases seen to date, it is difficult to be certain of all possible routes of transmission.Due to lack of proper equipment and hygienic practices, large scale epidemics are mostly problematic in poor, isolated areas without modern hospitals and/or well-educated medical staff.In modern hospitals with disposable needles and knowledge of basic hygiene and barrier nursing techniques (mask, gown, gloves), Ebola rarely spreads on such a large scale.In the early stages, Ebola may not be highly contagious.Many areas where the infectious reservoir exists have just these characteristics.So far all epidemics of Ebola have occurred in sub-optimal hospital conditions, where practices of basic hygiene and sanitation are often either luxuries or unknown to caretakers and where disposable needles and autoclaves are unavailable or too expensive
Edited sentence: Although easy to demonstrate in laboratory conditions with monkeys16,17,18, there has never been a documented case of airborn transmission in human epidemics.At least not in the early stages.However it is not something that most modern hospitals cannot handle.It is just not all that contagious.It just so happens that such places exist in abundance in areas where the infectious reservoir mystery animal happens to be.Later on bodily fluids from diarrhea, vomiting, and bleeding represent an extreme bio-hazard.So far all epidemics have occurred in the lowest of third world hospital conditions, where basic hygiene and sanitation are often luxuries and where disposable needles and autoclaves are too expensive.So it can be difficult to be certain as to all possible routes of transmission based on a limited number of cases.So large scale epidemics are mostly problematic in poor, isolated towns without modern hospitals.Without these conditions, in modern air conditioned hospitals with disposable needles and knowledge of basic hygiene and barrier nursing techniques (mask, gown, gloves), Ebola rarely spreads on such a large scale