The Charleston hospital, like other hospitals, mailed out these test kits with little cards on which patients were meant to capture a stool sample. To ensure that the test kits made their way back to the hospital, the hospital enclosed pre-addressed envelopes. Carter had asked if they could go see where the test-kit envelopes arrived. They took him to the mailroom, where someone dumped the sack with that day’s mail onto a table. A bunch of test kits were in the pile, but each envelope bore the same red notice: Insufficient Postage: Return to Sender. (“Thank God the post office delivered them
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