The CDC is still trying to understand the mechanism by which Vitamin E acetate, an additive in some vapes, injures lung tissue. It may interfere with a natural fluid in the lung called surfactant, which helps make lung tissue stretchy. Or a byproduct may be a toxic chemical.

The CDC is still trying to understand the mechanism by which Vitamin E acetate, an additive in some vapes, injures lung tissue. It may interfere with a natural fluid in the lung called surfactant, which helps make lung tissue stretchy. Or a byproduct may be a toxic chemical.