title: Mass immunization campaign in El Salvador, 1969. Evaluation of receptivity and recommendation for future campaigns.
mesh_terms: D000328:Adult; D001294:Attitude to Health; D002675:Child, Preschool; D003142:Communication; D004544:El Salvador; D005260:Female; D006285:Health Planning; D006801:Humans; D007114:Immunization; D007223:Infant; D008297:Male; D008457:Measles / Q000517:prevention & control; D011051:Poliomyelitis / Q000517:prevention & control; D012959:Socioeconomic Factors; D014376:Tuberculosis / Q000517:prevention & control; D014611:Vaccination