The human nervous system is very sensitive to all forms of mercury. Methylmercury and metal vapors are more harmful
than other forms, because more mercury in these forms reaches the brain. Exposure to high levels of metallic,
inorganic, or organic mercury can permanently damage the brain, kidneys, and developing fetus. Effects on brain
functioning may result in irritability, shyness, tremors, changes in vision or hearing, and memory problems.
Short-term exposure to high levels of metallic mercury vapors may cause effects including lung damage, nausea,
vomiting, diarrhea, increases in blood pressure or heart rate, skin rashes, and eye irritation. Very young children
are more sensitive to mercury than adults. Children poisoned by mercury may develop problems of their nervous and
digestive systems and kidney damage.