In this new study, several doctors who are proponents of ozone therapy tried it out on four healthcare workers in Liberia with Ebola symptoms (three tested positive for the disease, the other had been exposed to the virus but that patient's tests had still come back negative). For ten days, the researchers gave the patients ozone by infusing it into their blood through their veins, passing it into their rectums, and giving them ozonized water to drink. The researchers write that the patients’ symptoms abated after just a few days, and none died--which surprised the researchers, since the survival rate of healthcare workers infected with Ebola was just 40 percent. “Typically, death occurs within a week or less in the majority of cases. In all our ozone treated cases, symptoms did not progress from the start of ozone therapy, and symptomatic patients were totally free of all symptoms, inclusive of fever, generally by day 3 of treatment,” the researchers write. Though they haven’t tested the mechanism in the lab, the researchers suspect that the ozone damages the surface of the virus so that it can’t infect the cells of its host. And, unlike other emerging Ebola treatments, ozone therapy is inexpensive, costing only $10 per day.