The most cause of death in low income nation could be infectious disease. It is because low income nations are the places of which are still experiencing poverty and does not progress like the developing or the developed countries. Because of the poverty they are experiencing, they couldn't afford some things that are necessary for them such as going to check ups or medicines because their priority is the basic needs such as food, with these reasons, infectious disease could occur and could lead to death because they couldn't afford check ups or buy medicines.