We secured an important victory for Wyeth LLC (whose parent is Pfizer Inc.) in the U.S. Supreme Court, which held that a federal statute preempts state-law causes of action based on theories of defective design in governmentally-approved child vaccines. The opinion attracted the support of six justices, and adopted many of the arguments advanced in Wyeth’s brief. For Quinn Emanuel and counsel of record Kathleen Sullivan, the win represented the third in as many terms at the Supreme Court. The decision has significant implications for public health and the vaccine supply, as it removes design-defect claims that if permitted would have increased manufacturers’ costs and depressed vaccine supply and development.