My voice echoes across the metal walls around me, but the door stays closed. A speaker crackles on around us and Vincent’s voice asks, “Is there a problem?” “We don’t know if we’ve been infected or not. Since the first symptom shows up after about four hours, we’ll wait in here until then to make sure it’s safe.” There’s a slight pause. “And if you’re infected?” I swallow hard. “Then I guess you can send us back to the future. Permanently.” Ken gives me a miserable look, then sinks to the floor, leaning back against the accelerator’s walls. Settling in for a long wait. “Wish we’d brought a book or something.” “Or a pillow.” “What are you doing?” Adam’s voice asks through the speaker. “Making sure no one in the present gets the virus,” I say. Adam sighs. “Are you okay?” “We’re fine

