Nurse Pilar Rodríguez speaks with Paula Serra Caldes, 93, as she explains to her about vaccination against COVID-19, in the town of Sa Pobla on the Spanish Balearic Island of Mallorca, Spain, Friday, April 30, 2021. While thousands flock daily at health clinics and ad-hoc vaccination points across Spain, health workers also fan out across the country to take shots to some of those who are the most vulnerable to the coronavirus. (AP Photo/Francisco Ubilla)