In this photo taken on Friday, May 8, 2020, medical student Nikolaos Katsanakis poses for a photo at the entrance of the COVID-19 Clinic at Sotiria Hospital in Athens. Greece's main hospital for the treatment of COVID-19 is also the focus of a hands-on training program for dozens of medical students who volunteered to relieve hard-pressed doctors from their simpler duties while gaining a close peek at the front lines of a struggle unmatched in modern medical history. The sign below, placed above a box that has since been removed, reads ''This is where you leave your complaints, your suggestions and your congratulations too.'' (AP Photo/Thanassis Stavrakis)