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FILE - A blue rectangular piece of microplastic sits on the finger of a researcher with the University of Washington-Tacoma environmental science program, after it was found in debris collected from the Thea Foss Waterway, in Tacoma, Wash., May 19, 2010. (AP Photo/Ted S. Warren, File)

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Nevada researchers say the Cicada Variant of COVID-19 is not present in Nevada. Their research is conducted by gathering samples of wastewater at water treatment facilities, then passed on to the Southern Nevada Health District and the CDC.