Well, I find it easy to believe it's Judge. Sanji's defense was "nuh uh, I'm not modified", but he was.
2) Judge has a similar power.
3) Iffit Jambe was created via exoskeleton which means that Sanji needed that to "complete" his power.
4) Narratively, Queen raised it. And now we have a Germa 66 cover story.
5) Queen didn't cover Poison Pink either