Here your STG doctor will say that the cure itself is ready, but needs a method of dispersal across the Krogan. The first part of this Mission actually takes place after you've completed either Attican Traverse: Krogan Team or Tuchanka: Turian Platoon.

Non-Citadel: Grissom Academy: Emergency Evacuation, Tuchanka: Turian Platoon.

Presidium Commons: Citadel: Barla Von, interactions with Joker, EDI, Matriarch Aethya, and the two businessmen arguing about VIs.

Huerta Memorial Hospital: Citadel: Alien Medi-Gel Formula, Citadel: Biotic Amp Interfaces, Ismar Frontier: Prototype Components, interactions with Dr.

Purgatory Bar: Citadel: Improved Power Grid, interactions with James Vega.

Citadel Embassies: Benning: Evidence and Citadel: Hanar Diplomat.

Docks: Holding Area: interactions with Kelly and Garrus.

So before starting this mission, complete the following quests and activities if you plan to do them:

When this happens, a number of optional quests and interactions will be closed: you will not be able to either start and/or complete them, and you will lose out on any Credits, XP, War Assets, or Reputation associated with them. The conclusion of this mission leads directly to Priority: Citadel 2.

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