A Research Study of How Semaglutide Works in People With Disease Affecting the Heart and/or Blood Vessels and Type 2 Diabetes

This study looks into how the type 2 diabetes medicine, semaglutide, can prevent risk of heart disease complications and stroke. Participants will either get semaglutide or placebo ("dummy" medicine) - which treatment is decided by chance. Semaglutide is a new medicine to treat type 2 diabetes and can be prescribed by doctors in some countries. The study medicine will be in a pen, and must be injected with a needle in the stomach, thigh or upper arm once a week. The study will last for 57-63 weeks. Participants will have 10 clinic visits with the study doctor, 5 visits to the specialised clinic for imaging and at least 1 phone contact. Participants' health will be monitored carefully and blood samples will therefore be taken at the clinic visits. Women cannot take part if pregnant, breast-feeding or planning to become pregnant during the study period.