Your character came into contact with something contaminated and picked up a weak strain of the illness. She suffers mild symptoms based on the particular outbreak that contaminated her, and takes a –1 penalty to Social rolls against anyone who knows about her infection; this becomes a bonus instead when she threatens them.
Possible Sources: Exposure to Contagion vectors; dramatically failing a Contagion Carrier roll.
Resolution: Avoid supernatural or skin-to-skin contact with any infected source for one full chapter, or progress to the Infected (Stage 1) Condition.