She doesn't want an apology, but the intrusive bullshit has to stop. When she's ready to talk more in depth, she'll bring things up herself. For now, there's a sound that might be considered a low growl as she feels like she wants to punch the nosiness right out of him. He's asked a perfectly valid question, but she's paranoid and irrational and fears him knowing too much.

"I'm immune." She shrugs and doesn't sound or look happy about it. Her hand drops away to rest at her side, her posture and stance awkward and gangly. "I don't know or give a shit why, I just know that I'm the only one that can maybe save everyone so I have to get back and finish what I started."