Blaise had no idea how he was cast back into this time, but he had no intention of putting off his training in healing because of it. However there were a few issues he had with working at St Mungo's. Such as he worried that if he saved the wrong person who shouldn't be saved, or even fail to save someone who needed to be saved, he might ruin his own future. While his life hadn't been perfect, he was the sort to believe that things would get worse a lot more likely than better. So when the opportunity came to study while remaining at Hogwarts, he took it up in a heartbeat. As far as he remembered the war never really came to Hogwarts during these years. Healing students would not be problematic. Plus he would be safe as anyone could be from the war while staying close by for when they found a way to send him and the others back to their own time. He moved around the hospital wing making sure everything was in it's place. There weren't any patients currently, but remembering his own school years he knew that could quickly and easily change.