Chile is on track to have 80% of its population vaccinated by July. Since early February, it’s been vaccinating a million people a week. The country has deals with American, European and Chinese vaccine companies and enough supply in the pipeline to fully vaccinate its population twice. How has Chile managed this enviable vaccine rollout when so many neighboring countries have not? Marco Werman speaks with María Francisca Crispi Galleguillos, a professor at the School of Public Health at the University of Chile in Santiago.