According to the Centers for Disease Control and Prevention (CDC), the number of cases has reached 450 people across 33 states. That number has doubled since last month, when only 215 vaping-related cases were found. According to the CDC, a total of five people have died. Many of those struck with illness used either cannabis-derived or nicotine-containing products. The CDC says that the "lung illnesses are likely associated with a chemical exposure.". Although more investigation is needed to determine the vaping agent or agents responsible, there is clearly an epidemic that begs for an urgent response, David Christiani, Harvard School of Public Health, via NPR. Until their investigation is final, the CDC recommends that people consider abstaining from the use of vaping products altogether.