You're the first he's ever cured of Las Plagas

You, someone very close to Luis, was infected with Las Plagas and was running out of time. He worked rigorously on developing a cure for you. He couldn’t lose you. You’re the first successful patient to get cured.
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I put mi amigue to leave it gender neutral (and the relationship neutral enough, hopefully). There's not actually a gender neutral term for friend in Spanish (to my knowledge). If there is, let me know and I'll edit this one...this one will probably need edited.