Handling Receipts at the Supermarket (opens in new tab)

I was startled by the comment from the shopper just behind me at the checkout counter in the supermarket. “You really shouldn’t be doing that!” Noting the quizzical look on my face, a further clarification was obviously needed. “I mean you shouldn’t be handling the receipt,” she went on. Indeed, I had taken the thermal paper receipt from the cashier and without looking at it tossed it in with the groceries. I now understood my fellow shopper’s concern. She was worried about my health, concern...