Diagnosis and treatment of lead poisoning in children: follow Decision n o 1548/QĐ-BYT of Ministry of Health date on 10/5/2012 4 Diagnosis: a) Severe level: Blood lead levels (BLLs) >70 µg / dL b) Moderate level: BLLs from 45 to 70 µg / dL c) Mild level: BLLs from >10 to < 45µg / dL In addition to blood lead testing, it is necessary to assess further by clinical symptoms, other probes such as hematology, blood biochemistry, 24 hours lead urinary and other tests if necessary.