Aura of Regeneration

You touch a willing creature. The creaturel must have at least 1 hit point remaining. The 2 creatures engage in an exchange if aura. As the spell takes effect, both creatures sacrifice their bonus action on their next turn. 

One creature will regain 25% of its total hp while the other creature will be cured of one disease its been infected with. 

At higher levels the healing increases. When cast as a 7th level spell, the healed creature regains 50% of its total health back while the other is cured of 2 diseases. When cast as an 8th Level spell, the cured regains 75% of its health back while the other is cured of 3 diseases and all exhaustion. When cast as a 9th level spell, both creatures are cured of 100% health and removed of all diseases and exhaustion.