Association of Social Distancing, Population Density, and Temperature With the Instantaneous Reproduction Number of SARS-CoV-2 in Counties Across the United States.

ABSTRACT:

Importance

Local variation in the transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) across the United States has not been well studied.

Objective

To examine the association of county-level factors with variation in the SARS-CoV-2 reproduction number over time.

Design, setting, and participants

This cohort study included 211 counties, representing state capitals and cities with at least 100 000 residents and including 178 892 208 US residents, in 46 states and the District of Columbia between February 25, 2020, and April 23, 2020.

Exposures

Social distancing, measured by percentage change in visits to nonessential businesses; population density; and daily wet-bulb temperatures.

Main outcomes and measures

Instantaneous reproducti

SUBMITTER: Rubin D 

PROVIDER: S-EPMC7378754 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature