A health worker vaccinates a young woman against COVID-19 with a dose donated by the United States in Quilmes, Argentina, on August 3, 2021. Latin America and the Caribbean have been the destination of millions of donated vaccines. And while some countries continue to receive free doses, in recent months others have changed their role and began donating to neighbors in the region and other countries not so close. (Gustavo Garello/AP)
–
