title: Immunization injections.
authors.forename: Sandra Jo
authors.initials: SJ
authors.lastname: Hammer
authors.forename: Howard
authors.initials: H
authors.lastname: Backer
authors.forename: Robert
authors.initials: R
authors.lastname: Schechter
mesh_terms: D006801:Humans; D007223:Infant; D007229:Infant Welfare; D007231:Infant, Newborn; D007273:Injections, Intramuscular / Q000295:instrumentation / Q000379:methods; D007279:Injections, Subcutaneous / Q000295:instrumentation / Q000379:methods; D009339:Needles / Q000592:standards*; D010146:Pain / Q000209:etiology / Q000517:prevention & control; D014481:United States; D014611:Vaccination / Q000295:instrumentation / Q000379:methods*