Experimental serum

The experimental serum is a quest item in Fallout 4.

Gameplay
An experimental serum created by Virgil during his time at the Institute, in order to counter the effects of the Forced Evolutionary Virus on a subject.

Location
Located inside the FEV lab, in the BioScience division inside the Institute. It can be found inside a device on a desk under the board of lights, in the back of the room with the two Super Mutants suspended in vats.

Related quest

 * Virgil's Cure