She turned and pushed out through the swinging doors. Patrick started after her, but Britney wiped her face and said, “It’s okay, Patrick. You stay and help figure things out here. I’ll go with her.”

He hesitated a moment, then nodded. Britney grabbed a baseball bat and jogged out after her best friend, her ponytail bouncing from side to side, the bright ribbon flashing into view.

“Okay,” Chatterjee said. “Chance, will you come up here and explain to everyone what you explained to me?”

I walked to the front, sensing all those sets of eyes on me, a familiar self-consciousness welling in my chest. I felt better when Cassius padded over and sat next to me. I cleared my throat. “Look, I’m not sure about this, but there’s some stuff I thought might be right, maybe.”

“Chance,” Patrick said. “Just tell them.”

So I did. I went through what we’d managed to work out about the spores and the Hosts. Saying it out loud again, I realized just how much we still didn’t know. I felt like an impostor standing up there acting like I was some kind of expert. It didn’t help that Ben stood in the front, arms crossed. A few times Patrick urged me to speak louder so the kids in the back could hear, too. It was hard, but I got through it.

As soon as I was done, the questions started pouring in.

Eve asked, “Why do some of them swell up and explode and others chase kids around and look at the ground and stuff?”

“I have no idea,” I said.

“In some species it’s not uncommon to see differentiated roles,” Dr. Chatterjee said, stepping in to help me. “Like ants and bees have drones, workers, and queens. Or it could be that the first-generation Hosts serve to spread the infection and the second-generation Hosts…” He paused. “Act differently.”

Little Jenny White raised her hand next. “I stabbed Mrs. Johnson through the stomach. And she lived.”

Her cheeks were flushed, and her chin trembled. Nine years old or so, standing there in a bloody dress, talking about putting a knife through her neighbor’s gut. A week ago it would have been unthinkable. A day ago it would have been unthinkable.

When Jenny spoke again, her voice was hoarse. “So how do you kill them?”

“We think it’s their brains that are effected,” I said. “So you gotta shoot them in the head.”

Marina Mendez piped up from her post by the window atop the bleachers. “Just like z—”

“Don’t say it,” Rocky cut in.

Dezi Siegler, one of Ben’s buddies, called out from the back, “But we don’t have any guns. Except your brother. And you.”

“Yeah,” Leonora Rose said. “Does other stuff work? Like if you bash them in the skull?”