When taken, this pill halts the progression of the virus gauge for a short amount of time. Given that you only have a limited amount of time before the T-Virus infects your body completely, it is advisable to take these as and when you get them to give yourself more time to complete the scenario.
Experimentation chamber - Umbrella research facility
Very Hard
Anti Virus (×1) - On the floor inside the large cage in the north west corner of the area behind the laser beam wall. You can only access this area once the Tyrant has been released from the observation mezzanine.