14 November is World Diabetes Day, which aims to raise awareness of diabetes and help improve the lives of the more than half a billion people living with diabetes worldwide. For patients with insulin-dependent diabetes, maintaining a healthy blood glucose level can be challenging. Automated insulin delivery (AID) systems, or hybrid closed-loop systems, have been developed to make the job easier. Such systems allow for a complete circle of communication between a continuous glucose monitor (CGM) and insulin pump, which tracks blood glucose and automatically adjusts insulin delivery to help control blood glucose levels.