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. 2021 Jul 16;70(28):1004–1007. doi: 10.15585/mmwr.mm7028e2

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The figure is a histogram showing symptom onset date of COVID-19 cases associated with a SARS-CoV-2 B.1.617.2 (Delta) variant outbreak at a gymnastics facility (N = 47) in Oklahoma during April 15–May 3, 2021. — Symptom onset date* of COVID-19 cases associated with a SARS-CoV-2 B.1.617.2 (Delta) variant outbreak at gymnastics facility A (N = 47) — Oklahoma, April 15–May 3, 2021

* Or date of specimen collection, for asymptomatic or presymptomatic cases.