Google, Inc., Mountain View, CA, USA.
Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA.
Nat Commun. 2021 May 25;12(1):3118. doi: 10.1038/s41467-021-23404-5.
Social distancing remains an important strategy to combat the COVID-19 pandemic in the United States. However, the impacts of specific state-level policies on mobility and subsequent COVID-19 case trajectories have not been completely quantified. Using anonymized and aggregated mobility data from opted-in Google users, we found that state-level emergency declarations resulted in a 9.9% reduction in time spent away from places of residence. Implementation of one or more social distancing policies resulted in an additional 24.5% reduction in mobility the following week, and subsequent shelter-in-place mandates yielded an additional 29.0% reduction. Decreases in mobility were associated with substantial reductions in case growth two to four weeks later. For example, a 10% reduction in mobility was associated with a 17.5% reduction in case growth two weeks later. Given the continued reliance on social distancing policies to limit the spread of COVID-19, these results may be helpful to public health officials trying to balance infection control with the economic and social consequences of these policies.
社交隔离仍然是美国对抗 COVID-19 大流行的重要策略。然而，特定州级政策对流动性的影响以及随后 COVID-19 病例的发展轨迹尚未完全量化。我们使用来自选择加入 Google 的用户的匿名和聚合移动数据发现，州级紧急声明导致离家时间减少了 9.9%。实施一项或多项社会隔离政策，随后一周的流动性减少了 24.5%，随后的就地避难令又减少了 29.0%。流动性的下降与两到四周后病例增长的大幅下降有关。例如，流动性减少 10%与两周后病例增长减少 17.5%有关。鉴于继续依赖社会隔离政策来限制 COVID-19 的传播，这些结果可能对试图平衡感染控制与这些政策的经济和社会后果的公共卫生官员有所帮助。
