The Normandy's doctor has noted a group in the refugee camp that has military medical supplies but needs simple civilian necessities. Meet Tactus in the refugee camp to broker a trade.
Acquisition[]
After returning to the Normandy from the Citadel you will be notified by Specialist Traynor that the medical officer (either Dr. Chakwas or Dr. Michel) wishes to speak with you. Go speak to her.
Walkthrough[]
Go to the Docks: Holding Area in the Citadel and head to the refugee medical center in Cargo Hold B. There you will find a turian named Tactus on the right hand side. When you talk to him, he recognizes you but states he is unwilling to give away the refugees' medical supplies due to a combination of his distrust of the Alliance, the dire situation of his people, and the high value of the supplies.
If you have enough reputation, you'll be able to convince Tactus to trade supplies as Chakwas/Michel had suggested by emphasizing either the potential mutual benefits or the stark military realities. If those dialogue options aren't available or you want a larger morality point reward, you can give your supplies away asking nothing in return for +15 Paragon points. Asking Tactus to reconsider will result in his refusal, as he states he can likely get a better offer from the black market, though you can still talk to him again later to reopen the discussion.
If you successfully negotiate a trade, speak with the medical officer to finish this mission. If you haven't yet brokered the trade, the doctor simply tells you it would be good if you did, and the mission remains open in the Journal.
Rewards[]
You will gain 5 Reputation, 375 experience, and the Med Bay Surgery intel. If the mission was completed through Charm or Intimidation, you may also receive one of two upgrades. If Dr. Chakwas is your medical officer, you receive the Efficiency Increase Medi-Gel Upgrade, which provides a 50% probability[1] that a unit of medi-gel is not expended when Shepard heals the squad, effectively doubling the usable amount of medi-gel. If Dr. Michel is the medical officer, your medi-gel capacity is increased by two additional units.
Note: In subsequent playthroughs with the same character (New Game+) the upgrades can be unlocked again. Extra medi-gel doses are carried over but not the efficiency improvement. Thus, the extra capacity obtained from Dr. Michel can be accumulated (two extra units per playthrough). To gain the benefit of both Michel and Chakwas's upgrades, pick Michel in your initial Mass Effect 3 playthrough and Chakwas in subsequent playthroughs.[2]