WASHINGTON – Federal health officials have identified vitamin E acetate in the lung fluids of 29 people sickened in the outbreak of dangerous vaping-related lung injuries. The discovery is a “breakthrough” that points to the oil as a likely culprit in the outbreak that has sickened more than 2,000 people and killed at least 39, a top official said Friday. “These findings provide direct evidence of vitamin E acetate at the primary site of injury within the lungs,” said Anne Schuchat, principal deputy director at the Centers for Disease Control and Prevention.