The effects of social class and friends' expectations on oral polio vaccination participation.
D001290:Attitude; D006266:Health Education; D006801:Humans; D007115:Immunization Schedule; D011055:Poliovirus Vaccine, Oral; D012494:Sampling Studies; D012924:Social Conditions; D014481:United States; D014611:Vaccination
D011055:Poliovirus Vaccine, Oral