Community spread of COVID-19 in New York City revealed by contact tracing researchsquare Columbia WeillCornell COVID19 coronavirus covid NewYork contacttracing
By Pooja Toshniwal PahariaAug 1 2022Reviewed by Danielle Ellis, B.Sc. In a recent study posted to the Research Square* preprint server, researchers assessed the transmission of severe acute respiratory syndrome coronavirus 2 in New York City communities by contact tracing.
Contact tracing data were obtained from case investigations and SARS-CoV-2 antigen and molecular test reports for 644,029 coronavirus disease 2019 cases and their close contacts in NYC during the second wave of the COVID-19 pandemic to quantify the spatial pattern of community-level SARS-CoV-2 transmission. The study was conducted between 1 October 2020 and 10 May 2021.
Further, the impact of public health interventions on community transmission of SARS-CoV-2 was evaluated. Data on 4,642 events of non-household SARS-CoV-2 transmission were obtained from mobile phones with documented weekly counts of persons at points of interest such as grocery stores, restaurants, bars, and gyms in geographical areas with different ZIP codes used.
Most of the index cases were 20 to 49 years old, with frequent social interactions among similarly aged individuals and greater inter-generation interactions in households. SARS-CoV-2 transmission chains were heterogeneous and comprised 947,042 persons belonging to 242,486 disconnected clusters. Clusters of SARS-CoV-2 exposure were diverse and ranged from single spreader exposure networks to those with several spreaders.
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