title: California Senate Bill 277's Grandfather Clause and Nonmedical Vaccine Exemptions in California, 2015-2022.
authors.affiliation: Department of Geography, George Mason University, Fairfax, Virginia.
authors.forename: Paul L
authors.initials: PL
authors.lastname: Delamater
authors.affiliation: Department of Geography, George Mason University, Fairfax, Virginia.
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Leslie
authors.affiliation: Department of Health Administration and Policy, George Mason University, Fairfax, Virginia.
authors.forename: Y Tony
authors.initials: YT
authors.lastname: Yang
mesh_terms: D002140:California; D002648:Child; D002675:Child, Preschool; D006801:Humans; D012574:Schools; D013334:Students / Q000331:legislation & jurisprudence*; D014611:Vaccination / Q000331:legislation & jurisprudence*; D000072758:Vaccination Refusal / Q000331:legislation & jurisprudence*