Large events and gatherings, particularly those taking place indoors, have been linked to multitransmission events that have accelerated the pandemic spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To provide real-time, geolocalized risk information, we developed an interactive online dashboard that estimates the risk that at least one individual with SARS-CoV-2 is present in gatherings of different sizes in the United States. The website combines documented case reports at the county level with ascertainment bias information obtained via population-wide serological surveys to estimate real-time circulating, per-capita infection rates. These rates are updated daily as a means to visualize the risk associated with gatherings, including county maps and state-level plots. The website provides data-driven information to help individuals and policy makers make prudent decisions (for example, increasing mask-wearing compliance and avoiding larger gatherings) that could help control the spread of SARS-CoV-2, particularly in hard-hit regions.

大型活动和聚会，特别是在室内举行的活动和聚会，与多重传播事件有关，这些事件加速了严重急性呼吸综合征冠状病毒 2 (SARS-CoV-2) 的大流行传播。为了提供实时、地理定位的风险信息，我们开发了一个交互式在线仪表板，用于估计美国不同规模的聚会中至少有一名 SARS-CoV-2 感染者的风险。该网站将县级记录的病例报告与通过全人群血清学调查获得的确定偏差信息结合起来，以估计实时传播的人均感染率。这些比率每天都会更新，作为可视化与聚会相关的风险的一种手段，包括县地图和州级地块。该网站提供数据驱动的信息，帮助个人和政策制定者做出审慎的决定（例如，提高戴口罩的合规性和避免大型集会），从而有助于控制 SARS-CoV-2 的传播，特别是在疫情严重的地区。