Good discussion in a FREE online article over at the Wall Street Journal: "If We Must RationVaccines for a Flu,Who Calls the Shots?," by Sharon Begley. Here's the teaser:You have 100 doses of a vaccine against a deadly strain of influenza that is sweeping the country, with no prospect of obtaining more. Standing in line are 100 schoolchildren and 100 elderly people.The elderly are more likely to