In Acts, Luke reports that some of the cures performed by Philip included persons liberated of Unclean Spirits. He tells us that the Spirits cried out with loud shrieks as they reluctantly departed from their unwilling hosts (Acts 8.7). Later, he rehearses the speech of Peter in which he told how Jesus went about healing all who were oppressed by Devil (Acts 10.38).
We have already seen that Luke reported Peter’s account to a group of Gentiles of how Jesus went about healing all who were oppressed by Devil (Acts 10.38).
One of Satan’s main functions is as a “prover,” a “tryer of men’s souls.” He fulfills this function by testing Jesus in the wilderness, with the intention of continuing the process later (Luke 4). As part of his testing regimen, Satan makes use of disease-Spirits (Luke 13, cf. Acts 10).