As the Democratic presidential hopefuls prepare to take to the debate stage tonight, we turn to a central issue of the campaign: Medicare for All. In a new study, Yale scholars have found that Medicare for All will save Americans more than $450 billion and prevent 68,000 deaths every year. The study in The Lancet — one of the oldest and most prestigious peer-reviewed medical journals — found that Medicare for All, supported by Bernie Sanders and Elizabeth Warren, will save money and is more cost-effective than “Medicare for All Who Want It, “a model supported by Pete Buttigieg. Sanders referenced the study at a campaign rally in Carson City, Nevada. For more, we go to New Haven, Connecticut, where we’re joined by Alison Galvani, director of the Center for Infectious Disease Modeling and Analysis at Yale’s School of Public Health. She is the lead author of the new Lancet study, “Improving the prognosis of health care in the USA.”