Healing

I wonder how Healing differs from Regenerative Healing Factor. Like, the second one is one of variations and focuses to heal body rapidly while Healing is more wide term?

Can someone who is immortal use their immortality in some way to heal someone else? Like in a sense, transfer some of it to them to heal them.

Like person A has a burn scar they want healed. Person B is immortal. Could they transfer some of that immortality to someone else to heal said burn scar?

So with all the healing and or regeneration powers of the Absolute Category. is there any power in which it would allow you to heal another person. for example.

If a person with Absolute Immortality forced someone to drink there blood. would this heal them, or even make them immortal to a certain point?