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Suspected third SARS-CoV-2 infections, Clark County, Nevada, USA, March 2021–March 2022. Dotted lines show timeframe for identification of Delta and Omicron SARS-CoV-2 variants in Clark County. Suspected third infections were defined as a third positive PCR test collected >90 days after a second positive test collected >90 days after a person’s initial positive PCR test.
