take its course

to continue along its way; [for a disease] to progress the way it normally progresses until it is cured naturally. There is really no good medicine for this. This disease simply has to take its course.

Common Names:

Name	Pronounced	Usage
Panos	-	Greek
Anas	-	Arabic
Reza	-	Persian
Ilia	eel-YAH (Russian)	Georgian, Russian, Bulgarian, Old Church Slavic
Ferrutius	-	Late Roman
HlÍF	-	Ancient Scandinavian, Icelandic