An Outbreak of Breakthrough Infections by the SARS-CoV-2 Delta Variant in a Psychiatric Closed Ward.
J Korean Med Sci
; 37(4): e28, 2022 Jan 24.
Article
in English
| MEDLINE | ID: covidwho-1650103
ABSTRACT
BACKGROUND:
A rapid decline in immunity and low neutralizing activity against the delta variant in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccinees has been observed. This study describes an outbreak of coronavirus disease 2019 (COVID-19) breakthrough infections caused by the SARS-CoV-2 delta variant in a psychiatric closed ward.METHODS:
Data from epidemic intelligence service officers were utilized to obtain information regarding demographic, vaccination history, and clinical data along with SARS-CoV-2 PCR test results for a COVID-19 outbreak that occurred in a closed psychiatric ward.RESULTS:
Among the 164 residents, 144 (87.8%) received two doses of vaccines and 137 (95.1%) of them received ChAdOx1 nCoV-19 vaccine. The mean interval between the second vaccination and COVID-19 diagnosis was 132.77 ± 40.68 days. At the time of detection of the index case, SARS-CoV-2 had spread throughout the ward, infecting 162 of 164 residents. The case-fatality ratio was lower than that in the previously reported outbreak before the vaccination (1.2%, 2/162 vs. 6.9%, P = 0.030). Prolonged hospitalization occurred in 17 patients (11.1%) and was less prevalent in the vaccinated group than in the unvaccinated group (8.5% vs. 25.0%, P = 0.040).CONCLUSION:
The findings of this study highlight that while vaccination can reduce mortality and the duration of hospitalization, it is not sufficient to prevent an outbreak of the SARS-CoV-2 delta variant in the present psychiatric hospital setting.Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Psychiatric Department, Hospital
/
Disease Outbreaks
/
SARS-CoV-2
/
COVID-19
Type of study:
Diagnostic study
/
Observational study
/
Prognostic study
Topics:
Vaccines
/
Variants
Limits:
Humans
Language:
English
Journal:
J Korean Med Sci
Journal subject:
Medicine
Year:
2022
Document Type:
Article
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