Objectives To report the person-to-staff transmission of COVID-19 with the implementation of a bubble concept that included testing, hygiene, distancing and monitoring strategies to mitigate risks. Methods A prospective case series included all staff on-site involved in the Football Club World Cup. The tournament was conducted within ‘bubbles’. All personnel travelling to the tournament were required to be in possession of a negative RT-PCR test within 72 hours of arrival and subjected to a testing schedule during the tournament. Each location was assigned a COVID-19 protocol enforcement officer to ensure adherence to regular testing, hygiene measures, physical distancing and daily symptom reporting (via ScribePro app). Results The study involved 70 recruited staff with a combined 1321 test days on the symptom checker app. The mean number of days completed on the symptom checker app was 18.87 days (range: 7–28). Of the five questions asked as part of the daily symptom checker, only one was answered positively (0.015%). This individual was isolated, assessed within 20 min and tested. The initial diagnosis was likely a non-COVID-19-related viral illness. Further testing returned three negative tests during the remainder of the tournament. Conclusions There was no person-to-staff transmission of COVID-19 during the tournament within our sample. The organisation of a sporting tournament during the COVID-19 pandemic is possible with risk mitigation strategies. These strategies include setting up a bubble with regular testing, hygiene measures, physical distancing and daily symptom reporting. Data are available upon reasonable request.

中文翻译：

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COVID-19 大流行期间体育比赛的泡沫概念：足球俱乐部世界杯

目标 通过实施气泡概念报告 COVID-19 的人与员工之间的传播，该概念包括测试、卫生、疏远和监控策略以减轻风险。方法 前瞻性案例系列包括所有参与足球俱乐部世界杯的现场工作人员。比赛是在“泡沫”中进行的。所有前往比赛的人员都必须在抵达后 72 小时内进行阴性 RT-PCR 测试，并在比赛期间接受测试计划。每个地点都分配了一名 COVID-19 协议执行官，以确保遵守定期检测、卫生措施、保持社交距离和每日症状报告（通过 ScribePro 应用程序）。结果 该研究涉及 70 名招募的员工，在症状检查器应用程序上总共测试了 1321 天。在症状检查应用程序上完成的平均天数为 18.87 天（范围：7-28）。在作为日常症状检查程序的一部分提出的五个问题中，只有一个得到了肯定的回答 (0.015%)。该个体被隔离，在 20 分钟内进行评估并进行测试。初步诊断可能是与 COVID-19 无关的病毒性疾病。在比赛的剩余时间里，进一步的测试返回了三个阴性测试。结论 在我们的样本中，在比赛期间没有 COVID-19 的人际传播。通过风险缓解策略，可以在 COVID-19 大流行期间组织体育比赛。这些策略包括通过定期检测、卫生措施、保持身体距离和每日症状报告来设置气泡。可应合理要求提供数据。