"Huh." John nodded, thinking over what that could mean. "So...pure human DNA was the only stuff not effected, huh?" He rubbed his chin. Yeah, that didn't sound great. "Anyone here capable of engineering something like that?" He hated to ask, but his first thought was that whatever it was might have been genetically modified then released to infect people.
"Not trying to say someone here would do something like that, just...all possibilities, right?" He came closer, looking over the DNA strands then turning to Tony. "I mean, aside from you, who else has that kind of scientific background that might have reason to make others sick? And why would they do it?"
John was the suspicious sort. He had to be where he came from. It's how he survived.