The Emergency Viral Response, also called the heartstopper, was a syringe filled with adrenaline and an immuno-response boosting cocktail formulated to work against a wide range of unknown contagions. This chemical would be injected into the heart. (RPG: "Core Rulebook")
The Emergency Viral Response was manufactured by the Tau'ri and was available at Phoenix Site. (RPG: "Core Rulebook")