None of the studies had the answer; they knew both forms of the virus existed, but not how they worked together. Kira turned back to the sample report from Marcus’s blood, combing through the results for any sign of the Spore. If it could get into the body, it would; there should be some sign of it in Marcus’s sample, but there was nothing. That meant that whatever happened to the Spore when it got into the body was happening very quickly, and leaving no trace.

That is, the Blob was the trace. Kira ran through the possibilities in her head: The virus obviously reacted to human blood and tissue—that was how it worked, using the host body’s own material to replicate itself—so maybe there was an extra layer of interaction. Maybe the Spore wasn’t designed to replicate itself at all, just to convert itself into the Blob and let that one replicate. It was weird, but it was possible. Whatever it does, thought Kira, it has to do it quickly: By the time we get a chance to test the blood, any samples of the Spore have all been converted. Kira ran her fingers through her hair, trying to figure out how to see the transformation in action. If she could get a sample of uninfected blood, and get it into the medicomp fast enough, she’d be able to study the actual process of infection. But where could she find uninfected human blood?

In the newborns. There were four pregnant women in the city due to deliver in the next week, and several samples beyond that if one of the other mothers delivered early.

She would put a request in to Dr. Skousen, just to see what he said. They always took blood samples at birth, but they usually didn’t test those samples for several minutes while they dealt with other problems—most blood samples aren’t this time-sensitive. If Kira’s theory was correct, they’d have to test the blood immediately if they wanted to see this specific reaction.

The next question was the more difficult one: If the Blob came from transformed Spores, where did the Spores come from? Did the Blob create them, or did it transform back? Observing that change would be difficult, because she had no idea how it worked, and thus how to re-create it. Obviously the transformation couldn’t happen in the blood, because it would reverse itself instantly. The lack of any Spore samples in Marcus’s blood attested to that. In the lungs, then? Does the Blob react to oxygen the same way the Spore reacts to tissue? It was the simplest answer, which made it the best place to start. But how could she test it?