Tom Frieden, MD, MPH, is a physician and public health leader who has fought disease and saved lives in the United States and globally. He led New York City’s tuberculosis control program and served as Health Commissioner under Mayor Bloomberg before directing the U.S. Centers for Disease Control and Prevention, where he helped stop the West Africa Ebola epidemic and advanced responses to H1N1, Zika, the opioid epidemic, and other threats. He is currently President and CEO of Resolve to Save Lives, which partners with countries to scale up proven solutions to the world's deadliest problems. His book, The Formula for Better Health: How to Save Millions of Lives—Including Your Own, distills decades of experience into a powerful framework for protecting health at every level—from personal habits to global systems.