In the Gospels, healing was meant to be a lifestyle, not an event. Let me explain: for most churches, healing is something that is pursued when someone in the church is sick. Someone has cancer or some serious disease and everyone pursues healing for them. However, for Jesus, healing was a lifestyle. Wherever he went, miracles followed. In the same way, he sent the disciples out to heal the sick as a lifestyle. This occurred both in Luke 9 and Luke 10. The third time He sent out the disciples is what is called the Great Commission at the end of Matthew and Mark. So, if the Great Commission is for today and for all Christians (which most churches I know of would say), than the lifestyle of healing the sick is also for today and for all Christians :).