DR. JACKSON is chief of pediatric infectious diseases at Children's Mercy Hospital, Kansas City, Mo., and professor of pediatrics at the University of Missouri-Kansas City. Write to Dr. Jackson atpdnews@elsevier.com. She has no financial relationships with Merck or the manufacturers of other vaccines discussed in this column.
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DR. JACKSON is chief of pediatric infectious diseases at Children's Mercy Hospital, Kansas City, Mo., and professor of pediatrics at the University of Missouri-Kansas City. Write to Dr. Jackson at