National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine adult adolescent aged middle aged Child Infant preschool 80 and over vaccines practice guideline inactivated cost-benefit analysis influenza antiviral agents / therapeutic use influenza a virus attenuated cost of illness influenza vaccines / adverse effects human / epidemiology human / prevention & control* Influenza Vaccines / administration & dosage* investigators=[] pharmaceutical influenza b virus pmid:16874296 collabauthor(name='advisory committee on immunization practices' affs=[{1: 'influenza division national center for immunization and respiratory diseases atlanta ga 30333 usa.'}]) nicole m smith raymond a strikas preservatives thimerosal