How many Covid-19 vaccines does the world really need? What will it take to address inequality in American health care? And should people be nicer to Moderna? First, we discuss the latest news in Covid-19 vaccines, including data from Sanofi and GlaxoSmithKline, the future of Novavax, and what comes next for Moderna. Then, STAT’s Usha Lee McFarling joins us to talk about a groundbreaking investigation into racial and ethnic disparities in American medicine — and why almost nothing has changed in the 20 years since it was published.