title: A time of ignorance, a time of pathos, a time of change. Preface.
authors: Mayo Clinic, Rochester, MN, USA. USA.
authors: Gregory A
authors: GA
authors: Poland
authors: Caroline M
authors: CM
authors: Poland
mesh_terms: D006801:Humans; D017053:Infection Control / Q000639:trends*; D007239:Infections / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology; D014611:Vaccination / Q000639:trends*; D014612:Vaccines / Q000494:pharmacology*
chemical_list: D014612:Vaccines