Address : Ingeniero Huergo 690 , San Telmo
Days: Tuesdays and Wednesdays from 11 to 12 AM
Thursdays and Fridays from 4 to 5 PM
Bring DNI and/or Passport and 1 syringe of 1cc that you can purchase at any pharmacy..just tell them it's for a yellow fever shot..if I remember right you need to do this at least 10 days before you travel.
This location was given to my be a Doctor so it is a safe place to go.