"We've logged your readings into our computers just in case," she adds. "So if anything comes up, we'll have a baseline for treating you. I'm not sure a vaccine is necessary, given your particular ... physiology. But I would appreciate it if you would inform me immediately of any changes in your normal routine, any signs of illness or abnormalities, so we can give you another scan."

She slips her hands into her pockets and considers Sigyn carefully for a moment. "One more thing, what is your age?"