She considered what he had to say, taking it in with a measure of displeasure at his explanation of what made the air fresh. "How can this air heal Terrans then if it is the same as all air?" She asked then because it did not make sense, there was no healing happening as she walked around out side breathing in this air instead of the air inside her home.
So he had been sick, but then it was gone. That did not make sense, she and Gamora were still sick and it did not seem that it was simply going to disappear no matter how well they hydrated or rested or sought out fresh air. "I did nothing. It was done to me." By who or when she didn't know but someone or something had tone this to her, it was nothing she had done.
"My sister is sick as well." She said her tone softening a little more. She knew Quill cared for her, and she knew on some level that all of this was not Quill's fault, any more than it was the fault of any of the other Terrans. Well maybe not all of them - she felt certain there could be blame laid upon at least one of them.