Institute works great for me! Allen's clue is absolutely horrendous and not something to tell someone without scruples, so he's being careful in who he tells... and Peter will likely ping him as someone he could trust in that sense.

While in a shady alley where a gambling ring is taking place, Allen will overhear a small woman scoff and say: "I heard there's already a cure, anyway, they just don't want people to know cause they're scared of people messing it up. All you have to do is have someone hurt ya... right to the brink of death, and then, before you kick the bucket, give them another whiff of that purple gas. It reverses everything."

weeps