"You know, it's kind of hard to trust someone when you don't know who that someone really is."
The subject of this article has been deemed non-canon because it contradicts the established movie continuity of the Marvel Cinematic Universe, and thus should not be taken as a part of the "real" MCU world.
"Mr. Green! The Enclave has released a bio-weapon. I'd been hoping to conduct a real-world test. If you can get me there, I believe the cure will destroy it."
Samuel Sterns[src]

The Enclave Bio-Weapon was a biological contamination device created by the Enclave.


After sending the Hulk to obtain a genetic simulator from the Enclave so that he could test the cure he had developed, Samuel Sterns informed Hulk that Enclave had unleashed a bio-weapon and that this was their chance to do a real-world test of the cure. The contamination enveloped a building in downtown New York City, much to the distress of citizens. The United States Armed Forces arrived to deal with the situation and attacked Hulk when he transported Sterns to the building. While Sterns was inside, Hulk fought the Army. Sterns successfully used the cure on the contamination, destroying it. Hulk then brought Sterns back to Empire State University. Sterns stated the the mission was invigorating and that now they had evidence that the cure worked.[1]