This movement from a high concentration area to a low concentration are is called Active transport.
<h3>Active Transport</h3>
Active transport by definition is a process that is characterized by the movement of molecules against a concentration gradient. Additionally, this process requires energy.
As in the question above, glucose molecules have to be moved across the gut lumen of higher glucose concentration to the intestinal cells of relatively low level of glucose.
The Marburg virus wasn't mutating this early on, therefore the Coronavirus is much more deadlier and almost impossible to get a cure for, due to the rapid change in pathogens!