Inoculation Feat 1
Source Pathfinder Advanced Player's Guide
Prerequisites trained in Medicine
You have practice combating plague, and your patients are less likely to succumb to the same disease again for a time.
When you successfully Treat a Disease on someone and they fully recover from the disease, they gain a +2 circumstance bonus to saving throws against that same disease for 1 week.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
GeneralA type of feat that any character can select, regardless of ancestry and class, as long as they meet the prerequisites. You can select a feat with this trait when your class grants a general feat.
HealingA healing effect restores a creature's body, typically by restoring Hit Points, but sometimes by removing diseases or other debilitating effects.
SkillA general feat with the skill trait improves your skills and their actions or gives you new actions for a skill. A feat with this trait can be selected when a class grants a skill feat or general feat. Archetype feats with the skill trait can be selected in place of a skill feat if you have that archetype's dedication feat.