title: Vaccination policies and rates of exemption from immunization, 2005-2011.
authors.forename: Saad B
authors.initials: SB
authors.lastname: Omer
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Richards
authors.forename: Michelle
authors.initials: M
authors.lastname: Ward
authors.forename: Robert A
authors.initials: RA
authors.lastname: Bednarczyk
mesh_terms: D006291:Health Policy / Q000331:legislation & jurisprudence; D006801:Humans; D007114:Immunization / Q000331:legislation & jurisprudence / Q000706:statistics & numerical data / Q000639:trends*; D014481:United States