title: Republican leaders scramble to clarify positions on vaccination.
authors: Seattle.
authors: Michael
authors: M
authors: McCarthy
mesh_terms: D018166:Health Care Reform / Q000331:legislation & jurisprudence*; D006801:Humans; D007857:Leadership; D011057:Politics; D014481:United States; D014611:Vaccination / Q000331:legislation & jurisprudence*