Arun Sankar/AFP via Getty Images hide caption toggle caption Arun Sankar/AFP via Getty Images People wait for their turn to receive the COVID-19 vaccine at a government hospital in Chennai, India, on Friday. Arun Sankar/AFP via Getty Images It's no secret why poor countries don't have as many vaccines as rich countries. "There's really just a scarcity of doses," says Kate Elder, senior vaccine policy adviser at Doctors Without Borders' Access Campaign. The question is, how do you fix it? In the U.S., more than 1 out of every 5 residents is fully vaccinated against COVID-19. The U.S. and several other wealthy nations, including Canada and many European Union member states, are on track to vaccinate most of their populations by mid-2022, according to a report from