Mealey's ( April 29, 2026, 8:39 AM EDT) -- SAN FRANCISCO — A manufacturer of bottled, flavored e-liquids tells the Ninth Circuit U.S. Court of Appeals that, more than four years after its case was stayed for the Food and Drug Administration to re-review and uphold a marketing denial order (MDO) banning sales of its products, the Circuit Court should address the unresolved issue of whether the FDA improperly adopted a “longitudinal comparative efficacy requirement” for vape products....