Magny en Vexin
Actually, no, according to the latest rulebook:
Rulebook p.28 wrote:
Poison: How does Poison work if I'm hit with it multiple times? (answered by Soka S)
Poison is not cumulative. Rather, the counter will always be set to the more recent Poison Effect value being applied. For example: If you have a Poison 2 Effect Die on you, and a Baddie with Poison 1 targets you with that Skill, your Poison Effect Die should be set to 1. The same is true in reverse - Poison 1 can be bumped to Poison 2 if that's what came second.