The Centers for Disease Control and Prevention (CDC) finally identified a primary suspect in the wave of vaping-related lung illnesses and deaths. Examining lung tissue samples of patients hospitalized with vaping-related illnesses, CDC found 100 percent tested positive for vitamin E acetate, which is often used to cut marijuana oils. This finding was not a surprise to those who have been arguing that the cause of these illnesses is not the commercial e-cigarette market, but the illicit market for THC vapes.