Indigenous nurse of the ethnic group Misak Anselmo Tunubala (L), 49, explains an indigenous elderly woman the importance of applying a vaccine against COVID-19 in the Guambia indigenous reservation, rural area of Silvia, department of Cauca, Colombia, on April 15, 2021. - Tunubala sweeps the mountains every day looking for elderly people from house to house, and explains them the importance of the vaccination against Covid-19 in their native language. There is widespread rejection to the COVID-19 vaccine among indigenous people in this community due to their belief in an ancestral plant-based medicine and the recommendations of religious leaders. (Photo by Luis ROBAYO / AFP)