Your touch infects a friendly creature with a magical disease. The target regains a number of hit points equal to 1d8 + your spellcasting ability modifier. The next time the target takes damage, the disease ends on the target and infects a new friendly creature within 10 feet of the first. The new target regains hit points equal to 1d8 + your spellcasting modifier. The next time the new target takes damage, the disease ends on it and moves to another friendly creature within 10 feet of it, continuing in this manner until no valid targets are in range or the spell ends. A creature can be healed by your contagious healing only once per casting of this spell. This spell has no effect on Undead or Constructs.