Special Delivery

Two qualifiers can apply to several of the standard means of delivery:
Cumulative: A poison may be mild in low concentrations but become
harmful with continued exposure. The GM must decide how much
exposure constitutes a “dose.” This might be time-based (e.g., a toxic
atmosphere that requires an hour of exposure) or based on the victim’s
bulk or body mass (ST/10 ounces of liquid, HP/5 pills, etc.). See Drinking
and Intoxication (p. 439) for a detailed example.
Persistent Gas: A respiratory agent or area-effect blood or contact
agent typically persists for 10 seconds or more, depending on wind.
Some contact agents leave a poisonous residue on exposed surfaces until
they’re washed away.