The challenge of vaccinating vulnerable children.
Rodewald
L E
LE
Santoli
J M
JM
D002648:Child; D006297:Health Services Accessibility; D006801:Humans; D007114:Immunization / Q000191:economics / Q000706:statistics & numerical data*; D017010:Reminder Systems; D012959:Socioeconomic Factors; D014481:United States