1 The Gerasene demoniac: this was the other side of the passaged we discussed in chapter 1 when Jesus told the man with the dreaded skin disease not to tell anyone. The healed demoniac wanted to go with Jesus but Jesus did not permit him to do so. Instead, he said to him, “Go to your home and to your people and tell them what the Lord has done for you, that he had mercy on you.” So he went away and began to proclaim in the Decapolis what Jesus had done for him, and all were amazed.
So the former demoniac became a great evangelist. I am guessing Jesus allowed him to do that now because Decapolis isn’t a Jewish area, so his evangelism will not affect Jewish opinion so much and cause them to try to make him a political king instead of the sacrificial lamb of God.
2 Jairus’ daughter and the bleeding woman: Again Jairus was told not to tell anyone, as they’re back in Jewish territory.
The bleeding woman was excluded by Mosaic law from active participation in the worship life of the Jews because her bleeding rendered her ritually unclean. So it wasn’t just a physical problem it was a social and spiritual problem for her as well.
Popular Jewish belief at the time took the prophecy of Malachi 4:2 to mean that the “wings” of the Messiah (the ends of the Jewish prayer shawl / robe) had healing in them, so the bleeding woman was actually showing that she believed in Jesus’ Messiahship by her action. (The word כָּנָף “kanaph” in Hebrew can be translated both as “wing” or as “fringes of garment”.)
And indeed, that faith enabled God’s healing to pass from Jesus to her. As Jesus’ reaction showed, he could sense that her touch was different from the touch of the jostling crowd. Hence “Daughter, your faith has made you well. Go in peace, and be healed of your disease.”