DataLine. Low U.S. vaccination rates get a booster shot.
D002675:Child, Preschool; D003141:Communicable Diseases / Q000453:epidemiology; D016527:Drug Costs; D006291:Health Policy / Q000191:economics*; D006801:Humans; D014481:United States / Q000453:epidemiology; D014611:Vaccination / Q000706:statistics & numerical data*