A cold chain delivery receipt with temperature control strips still attached to the back—all the indicator squares had long since changed color. This batch didn't go through the pharmacy. The receiving section listed a room identified only by number, without even a department name. The remarks section had four handwritten characters: "For live subjects, maintain cold chain." The recipient signature line had no name, just a fingerprint.

What you think"For live subjects. I saw it at the time, but I delivered them anyway. Back then I thought it had nothing to do with me."

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