The plague is killing humans but Conduits are immune once their powers have been activated, and John is using his powers to find and empower potential Conduits, sparing them at the cost of countless human lives each time.
The plague is killing humans but Conduits are immune once their powers have been activated. John acts like a ray sphere, using his powers to find and empower potential Conduits, sparing them at the cost of countless human lives each time.