Subjects: PNEUMOCOCCAL pneumonia; EPIDEMIOLOGY
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Subjects: PNEUMOCOCCAL pneumonia; LUNG infections; PNEUMOCOCCAL vaccines
Subjects: HUMAN skeleton; SCIENCE education; JIM Crow laws
Subjects: INFLUENZA; VIRUS diseases
Subjects: VACCINATION policies; MEDICAL laws; MEDICAL care costsUNITED StatesUNITED StatesUNITED StatesReport Available