What is the high lead content for a two-year-old baby

Patient's question:

No

Doctor's answer:

Lead levels generally reach L30～50 μg/dL (1.44～2.4 μmol/L) to be diagnostically significant. In children, blood lead levels exceeding 60 μg/dL (2.88 μmol/L) may manifest obvious neurological damage symptoms and signs; if blood lead levels persistently remain above 1.92 μmol/L (40 μg/dL), varying degrees of neurological damage may occur.