The fame of this cure, wrought so suddenly, perfectly, and only with the laying on of Paul's hands, could not but spread far and near; especially being done upon the governor: and men are usually very careful about their bodily health and welfare. So that their diseases were blessed occasions to bring them to the knowledge of God in Christ, whom Paul preached; and they might have perished eternally if they had not perished (or been thus near unto perishing) temporally.
Related Commentaries of Acts 28:9
Acts 28:9
9 So when this was done, others also, which had diseases in the island, came, and were healed: