COVID-19 Clusters and Outbreaks Among Non-Health Care, Noncongregate Workers in Chicago, Illinois: Surveillance Through the First Omicron Wave.
J Occup Environ Med
; 65(4): e211-e218, 2023 04 01.
Article
in English
| MEDLINE | ID: covidwho-2242594
ABSTRACT
OBJECTIVE:
To describe COVID-19 investigations by a large urban health department among non-health care, noncongregate workplaces and the utility of surveillance methods over time.METHODS:
Frequencies of workplace-associated clusters and outbreaks are described by workplace type, workforce size, and method of identification over time.RESULTS:
From April 2020 through January 2022, 496 COVID-19 investigations identified 442 clusters (89%) and 54 outbreaks (11%). Frontline essential workplaces comprised 36% of investigations before versus 15% after vaccine eligibility. Pre-Omicron, most investigations (84%) were identified through case interviews. During Omicron predominance, case interviews decreased dramatically and identified 10% of investigations. Offices (41%) and bars and restaurants (36%) were overrepresented, and only one outbreak was identified, given decreases in confirmatory testing.CONCLUSIONS:
Findings suggest that vaccine prioritization reduced COVID-19 burden among highest-risk workplaces, but surveillance methods likely became less representative over time.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
COVID-19
Type of study:
Experimental Studies
/
Observational study
/
Prognostic study
Topics:
Vaccines
/
Variants
Limits:
Humans
Country/Region as subject:
North America
Language:
English
Journal:
J Occup Environ Med
Journal subject:
Occupational Medicine
/
Environmental Health
Year:
2023
Document Type:
Article
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