Wyeth Pharmaceuticals doesn't make flu shots anymore, and it doesn't miss them one bit. For two decades, Wyeth made injectable influenza vaccine at a plant in Marietta, Pa. For the winter of 2002-03, it made 21 million doses in a labor-intensive, time-crunched process and shipped them to clinics and doctors' offices early in the fall. But it turned out a lot fewer people wanted it. Flu vaccine can't be saved from year to year. So, sometime the next spring Wyeth threw away 7 million unsold doses, for a loss of $30 million. It then quit making flu shots. It eventually...