COVID-19 Mitigation With Appropriate Safety Measures in an Essential Workplace: Lessons for Opening Work Settings in the United States During COVID-19
Open Access
- 22 February 2021
- journal article
- research article
- Published by Oxford University Press (OUP) in Open Forum Infectious Diseases
- Vol. 8 (4), ofab086
- https://doi.org/10.1093/ofid/ofab086
Abstract
Nonpharmaceutical interventions (NPIs) mitigate COVID-19. Essential workplaces remained open during COVID-19, but few U.S.-based settings detail outcomes. Mercury Systems is a U.S.-based manufacturing company that remained open during COVID-19. NPIs – distancing, masking, hand hygiene, ventilation- were successively deployed from March-August 2020. The company expanded sick leave, asked employees to report work outages from illness, and administered employee satisfaction surveys. Three sites in Arizona, southern California and New Hampshire administered testing campaigns via RT-PCR of nasal swabs in late July-early August for all employees at work or at home self-isolating due to symptoms. Descriptive statistics summarized findings. Among 586 employees at three sites, only 1.5% employees developed severe illness over the study duration. Testing campaigns revealed 44 with positive PCR results at a cycle threshold (CT) <37 (likely infectious) and 61 with a CT≥37 (low-level viral load). True positivity rates were consistent with community prevalence at the time: 1.1% in New Hampshire, 6.2% in California, 12.9% in Arizona. Of all employees with positive tests, 99% were asymptomatic. Employee surveys showed high satisfaction. In a multi-site U.S. company which instituted NPIs for COVID-19 mitigation, the proportion of asymptomatic COVID-19 infections on surveillance testing was high (99%). Although surges in community transmission were seen in two sites over the study, employee prevalence reflected community prevalence, despite daily workplace presence. This study demonstrates that NPIs likely mitigate severe COVID-19 illness, that PCR tests should incorporate CT values, and that expanded sick leave likely encourages self-isolation, suggesting strategies for work re-openings.Keywords
Funding Information
- National Institute of Allergy and Infectious Diseases
- National Institutes of Health (R01AI158013)
This publication has 24 references indexed in Scilit:
- Inactivation of Severe Acute Respiratory Syndrome Coronavirus 2 by WHO-Recommended Hand Rub Formulations and AlcoholsEmerging Infectious Diseases, 2020
- Asymptomatic Transmission, the Achilles’ Heel of Current Strategies to Control Covid-19The New England Journal of Medicine, 2020
- COVID-19 Among Workers in Meat and Poultry Processing Facilities ― 19 States, April 2020Morbidity and Mortality Weekly Report (MMWR), 2020
- Reducing risks from coronavirus transmission in the home—the role of viral loadBMJ, 2020
- Characteristics of Health Care Personnel with COVID-19 — United States, February 12–April 9, 2020Morbidity and Mortality Weekly Report (MMWR), 2020
- The Time for Universal Masking of the Public for Coronavirus Disease 2019 Is NowOpen Forum Infectious Diseases, 2020
- Effectiveness of airport screening at detecting travellers infected with novel coronavirus (2019-nCoV)Eurosurveillance, 2020
- Report on the Epidemiological Features of Coronavirus Disease 2019 (COVID-19) Outbreak in the Republic of Korea from January 19 to March 2, 2020Journal of Korean Medical Science, 2020
- Assessing the Dynamics and Control of Droplet- and Aerosol-Transmitted Influenza Using an Indoor Positioning SystemScientific Reports, 2019
- Professional and Home-Made Face Masks Reduce Exposure to Respiratory Infections among the General PopulationPLOS ONE, 2008