TY - RPRT TI - Two voluntary mass immunization programs using Sabin oral vaccine. AU - R B JOHNS AU - S FARNSWORTH AU - H THOMPSON AU - F BRADY PY - 1963 DO - 10.1001/jama.1963.03700030047010 UR - https://pubmed.ncbi.nlm.nih.gov/13957851/ ID - 13957851 ER -