Dr. Harrison is professor of pediatrics and pediatric infectious diseases at Children's Mercy Hospitals and Clinics, Kansas City, Mo. Dr. Harrison disclosed he was a consultant for MedImmune and on the speakers bureau up to 2000, but since then has had no financial ties to the company. He was on Merck's speakers bureau until January 2009; he still receives research funds from the company. To respond to this column, e-mail Dr. Harrison atpdnews@elsevier.com.