The primary and immediate problem we confront with T1D is the absence of insulin.
The solution to the problem is to inject insulin subcutaneously.
In a normal body the insulin is introduced through a duct in the pancreas directly into the digestive track. A T1D injects with a needle or an insulin pump a bit deeper than under the skin but not in the muscle and, God Forbid, not into the vein.
The solution enables the body to survive.
Now we are left with a very difficult challenge.
We want to attain normal and balanced blood sugar with this synthetically manufactured insulin that is going into the body in an abnormal manner.
Not an easy task.
Definitely a 10.0+ on the degree of difficulty scale.
The solution is not easy.
However, it is doable.