Tigray is running out of insulin, as no supplies have reached that region in months.

Tigray's government says that Ethiopia is blockading Tigray. Ethiopia's government says that Tigrayan forces are attacking aid trucks. The latter is a priori implausible, so I think that a blockade is the real cause.

It is easy for the Ethiopian government to block supply from Ethiopia. Why can't supplies be brought in from Sudan? Is it possible to air-drop medicine?