The body's reaction may continue to progress and cause damage to the lungs. CBD is said to exist when there is evidence of harmful effects to the lungs, i.e., when healthy lung tissue becomes damaged and changes from functioning lung tissue to fibrotic tissue. Damage to the lungs may be detected early by biopsy before there are symptoms (e.g. shortness of breath). Damage (i.e., fibrosis) may progress to the point that symptoms are severe enough to disable or cause death. In summary, the health effects from beryllium may be clinically silent (i.e., without symptoms) or may progress to substantial impairment or death.
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