"No pathogens," Luis confirmed, frowning slightly. "It took a while to be able to say for sure, since these are Oryan cells and not human cells like I'm familiar with, but... nothing. No viruses, no bacteria, no parasites. I don't know about wavelengths or anything like that, but the sick cells compare perfectly to the healthy cells."

He rubbed his eyes behind his glasses. "You may have been onto something about the water, though," he said. "Maybe some kind of contaminant?"