Last week, Allie, my 14-year-old daughter, and I went to the doctor together. Neither of us are sick. We are preparing to travel out of the country together, so we set up an appointment with a travel medicine physician, to be sure our immunizations are up to date and that we have our malaria prophylaxis covered. I handed the doctor the tattered stack of papers I have been carrying around since medical school, proving I have had my tetanus shots...