ADVERTISEMENT As artificial intelligence (AI) becomes part of everyday life, it is also finding a role in health care. At a children’s hospital in the US state of Massachusetts, a therapeutic robot named Robin roams the wards, checking in on young patients. Standing 1.2 metres tall, Robin has a sleek, white, triangular body that was designed, its developers say, for hugging. “Luca, how are you? It’s been a while,” Robin asked a six-year-old boy with leukaemia that the robot had met once before