I have noticed when I was younger, when my blood glucose control was poor, that when I got a cold or infection, I usually got a fever.As I got older and my blood glucose control improved I have noticed that I would get sick but not get a fever.I do not remember having had a fever for at least ten years.In the past year my blood glucose control has been near normal most of the time (this will be explained later).When I am sick I just feel tired and out of it, major symptoms are less pronounced and fevers are not there. Type 1 diabetics have blood glucose controlled by exogenous insulin and may therefore not experience spikes in blood glucose levels.I speculate that perhaps hyperglycemia is an important natural phenomenon that triggers an immune response and fevers, that non-diabetics would have while they have an infection, without even being aware of it (because they don’t check their blood glucose.)Could ketoacidosis have been the likely cause of many deaths attributed to fevers?