Since the approval of the first vaccines, public health officials warned that the research was just half the battle. Production, distribution and public health awareness are among the other challenges that each country has to contend with. Vaccine hesitancy is another major barrier — especially when leaders contribute to the skepticism. In Brazil, President Jair Bolsonaro has been public about his anti-vaccine position. Brazilians, on the other hand, have embraced the vaccine — according to a recent poll, 90% of Brazilians say they plan on getting vaccinated. Host Marco Werman speaks with Margareth Dalcolmo, a pulmonologist, researcher, and professor at the National School of Public Health of Brazil’s Oswaldo Cruz Foundation.