Demute chambers are devices designed by Doctor Cray and the other scientists in Area 51 they were supposed to remove the virus from the blood stream and DNA of those infected with it. In one of the files found around Area 51 and from first hand experience Ethan Cole finds out that the demute chambers outside of Cray’s lab are not as effective as they should be, they only slow the virus not removing it completely from the victim.
Doctor Cray has the original Demute chamber in his lab. It is feed directly by a vile of Edgar’s blood and has space to hold the blood of another person. It most likely would have cured Ethan Cole but due to a power surge the chamber was unable to finish its work and Ethan remained infected.