Your channeled energy wards off disease.
Benefit(s): When you channel positive energy to harm or turn undead creatures, any undead creatures in the area lose the ability to cause disease with their melee and ranged attacks for 1d4+1 rounds. If an undead creature successfully saves against your channeled energy, this duration is reduced to 1 round for that creature. Immunity to positive energy negates this ability.
When you channel positive energy to heal living creatures, any living creatures in the area gain a +4 sacred bonus on saving throws against disease for 1d4+1 rounds. Creatures not healed by positive energy receive no benefit.
Pathfinder Adventure Path #81: Shifting Sands © 2014, Paizo Inc.; Authors: Richard Pett, with Benjamin Bruck, Adam Daigle, Thurston Hillman, Michael McCarthy, Patrick Renie, Amber E. Scott, and Russ Taylor.