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Volume 27, Number 9—September 2021
Research

Estimating the Impact of Statewide Policies to Reduce Spread of Severe Acute Respiratory Syndrome Coronavirus 2 in Real Time, Colorado, USA

Andrea G. Buchwald1, Jude Bayham, Jimi Adams, David Bortz, Kathryn Colborn, Olivia Zarella, Meghan Buran, Jonathan Samet, Debashis Ghosh, Rachel Herlihy, and Elizabeth J. CarltonComments to Author 
Author affiliations: Colorado School of Public Health, Aurora, Colorado, USA (A.G. Buchwald, O. Zarella, M. Buran, J. Samet, D. Ghosh, E.J. Carlton); Colorado State University, Fort Collins, Colorado, USA (J. Bayham); University of Colorado, Denver, Colorado, USA (J. Adams); University of Colorado, Boulder, Colorado, USA (D. Bortz); University of Colorado School of Medicine, Aurora (K. Colborn); Colorado Department of Public Health and Environment, Denver (R. Herlihy)

Main Article

Table 1

Key state-level events, executive orders, and policies directed at controlling transmission of SARS-CoV-2, Colorado, USA, 2020*

Policy/event Description Date announced Policy effective date Policy effective until
First case of COVID-19
 First case of infection with SARS-CoV-2 reported
 Mar 5
 NA
 NA
Executive Order D 2020 003
 Disaster emergency
 Mar 10
 Mar 11
 Apr 11
Executive Order D 2020 004
 Ski resort closure
 Mar 14
 Mar 15
 Mar 22
Executive Order D 2020 006
 Extension of ski resort closure
 Mar 18
 Mar 18
 Apr 17
CDPHE Order 20–22
 Closure of bars, restaurants, theaters, gymnasiums, and casinos
 Mar 16
 Mar 17
 Apr 16
CDPHE Order 20–23
 Prohibition of >10 person gatherings
 Mar 19
 Mar 19
 Apr 19
Executive Order D 2020 007
 School closures during Mar 18‒Apr 17
 Mar 18
 Mar 18
 Apr 17
Executive Order D 2020 013
 Reduction of in-person workforce by 50%
 Mar 22
 Mar 24
 May10
Executive Order D 2020 017
 Stay-at-home order: directive to require all residents of Colorado to stay home unless in pursuant of essential items (i.e., food) or working for critical businesses and ordering noncritical businesses to close temporarily.
 Mar 25
 Mar 26
 Apr 11
Executive Order D 2020 021
 Extension to school closures until Apr 30
 Apr 1
 Apr 1
 May 1
Executive Order D 2020 024
 Stay-at-Home extension
 Apr 6
 Apr 6
 Apr 26
Executive Order D 2020 039
 Ordering workers in critical businesses and government functions to wear nonmedical face coverings
 Apr 17
 Apr 17
 May 17
Executive Order D 2020 041
 Suspension of school closures until end of school year
 Apr 22
 Apr 22
 May 20
Executive Order D 2020 044
 Safer at home: All susceptible persons and those who have COVID-19 instructed to stay at home. State residents directed to limit interactions, only travel for essential needs, and limit gatherings to <10 people in public and private spaces. Nonmedical mask coverings recommended. Retail businesses can open for curbside delivery, elective medical, dental, and veterinary surgeries and procedures resume. Retail businesses and personal services (e.g., salons) can open. Offices can open at 50% capacity.†
 Apr 26
 Apr 27–May 4
 May 27
Executive Order D 2020 058
 Disaster emergency extension
 May 7
 May 7
 Jun 6
Executive Order D 2020 067
 Extending EO D 2020 039, ordering workers in critical businesses and government, to wear nonmedical face coverings
 May 16
 May 16
 Jun 16
Executive Order D 2020 079 Extension to EO D 2020 044: Safer at Home to permit public places to offer outdoor dining, and limited indoor dining May 25 May 25 Jun 1

*COVID-19‒relevant executive orders are detailed in (11) and CDPHE policies are described in (12). CDPHE, Colorado Department of Public Health and Environment; COVID-19, coronavirus disease; EO, executive order; NA, not applicable; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2. †Retail business and personal services were permitted to open on May 1, offices were permitted to open at 50% capacity on May 4. All other measures went into effect April 27.

Main Article

1Current affiliation: University of Maryland School of Medicine, Baltimore, Maryland, USA.

Page created: June 02, 2021
Page updated: August 17, 2021
Page reviewed: August 17, 2021
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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