Fortunately, NONE of the above is true. In truth, you really cannot heal anybody other than yourself. The cells must always heal themselves, and you can't force that to happen. You can no more heal another person than you can digest the lunch that they just ate. Anybody who thinks that they are healing another person is either mistaken, egotistical, or delusional.
Healing is all about resonance and entrainment.
Everything vibrates, and when two things vibrate at different frequencies, there is a tendency for the vibrations to come together. Most often, the slower vibration will rise to match the faster frequency. Either the higher frequency will match the lower one, the lower one will match the higher one, or they will meet in the middle. Practitioners of hands-on healing ideally learn to hold a high vibration in their hands, and then through biological entrainment, the differing frequencies will match up. With effective techniques, a practitioner can learn to hold an extraordinarily high vibration, influencing and the person in need of healing to match the vibration of the practitioner.