title: Heaf grade 1.
mesh_terms: D000328:Adult; D000367:Age Factors; D001500:BCG Vaccine; D002675:Child, Preschool; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D008722:Methods; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis*
chemical_list: D001500:BCG Vaccine