Evidence map›Paper›PMID 40883842›Full record

ArticleJournal of occupational medicine and toxicology (London, England)2025

Outbreaks of COVID-19 among healthcare personnel in a U. S. veterans administration health care system site, June and August 2023.

Ignacio A Santana, Max Blumberg, Noreen Chan, Margaret J Ansay, Phyllis C Tien, Paul D Blanc, Sandeep Guntur

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PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of occupational medicine and toxicology (London, England), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ignacio A SantanaDivision of Occupational, Environmental and Climate Medicine, University of California, San Francisco, CA, USA.
Max BlumbergDivision of Occupational, Environmental and Climate Medicine, University of California, San Francisco, CA, USA.
Noreen ChanDepartment of Medicine San Francisco Veterans Affairs Health Care System, Division of Occupational Medicine, San Francisco, CA, USA.
Margaret J AnsayDepartment of Medicine San Francisco Veterans Affairs Health Care System, Division of Occupational Medicine, San Francisco, CA, USA.
Phyllis C TienDepartment of Medicine, Division of Infectious Diseases, San Francisco Veterans Affairs Health Care System, University of California, San Francisco, San Francisco, CA, USA.
Paul D BlancDivision of Occupational, Environmental and Climate Medicine, University of California, San Francisco, CA, USA.
Sandeep GunturDivision of Occupational, Environmental and Climate Medicine, University of California, San Francisco, CA, USA. sandeep.guntur@va.gov.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundOccupational COVID-19 remains a challenge among healthcare personnel (HCP).

methodsThis study documents three COVID-19 outbreaks that occurred among vaccinated HCP within a single health care system (HCS) in California, USA in June and August 2023. The Employee Health (EH) unit for the HCS conducted surveillance with structured interviews, identifying outbreaks in real-time.

resultsIn June, 10 of 25 staff (40%) at a rural outpatient clinic that serves the HCS contracted COVID-19. One week later, 10 of 90 staff (11%) at a second outpatient clinic were infected, with half the cases were staff of a single close-knit team. In August, a team-building retreat of staff from the main hospital of the HCS resulted in 15 of 23 participants (65%) contracting COVID-19. The combined attack rate for these outbreaks was 25% (95% CI: 18-32%). DISCUSSION: These outbreaks, despite high vaccination rates among the employees, reveal gaps in infection control, underscoring the need for stricter masking, improved ventilation, and rigorous surveillance testing. Rapid response to outbreaks and reinforcing education on symptom-based work exclusions are critical to preventing transmission among health care workers (HCWs) and their patients.

Indexed as

COVID-19Employee vaccinationMaskingOccupationalOutbreakSARS-CoV-2VentilationWork-related infection

Identifiers

PMID40883842
PMCPMC12398014

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.