No signs of illness. Chou, L. Y. T. & Chan, W. C. W. Nature Nanotech, 7(7):416–417, July, 2012. Bandiera_abtest: a Cg_type: Nature Research Journals Number: 7 Primary_atype: News & Views Publisher: Nature Publishing Group
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Quantum dots that contain cadmium, selenium and zinc are not toxic to monkeys for periods of up to 90 days, but longer-term studies are needed to determine the ultimate fate of the heavy metals that accumulate in the organs.

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