Article ; Online: Transmission dynamics and timing of key events for SARS-CoV-2 infection in healthcare workers.
Infectious diseases (London, England)
2021 Volume 53, Issue 7, Page(s) 531–537
Abstract: Background: Healthcare workers (HCWs) have increased risk for SARS-CoV-2 infection via contacts ... between symptom onsets in an infector-infectee pair, and the incubation period are key parameters ... in determining the control strategies for COVID-19. This study aimed to evaluate surveillance of HCWs and ...
| Abstract | Background: Healthcare workers (HCWs) have increased risk for SARS-CoV-2 infection via contacts in hospitals, as well as via transmission in the community. Serial interval, which is defined as the time between symptom onsets in an infector-infectee pair, and the incubation period are key parameters in determining the control strategies for COVID-19. This study aimed to evaluate surveillance of HCWs and estimate the serial interval and incubation period of COVID-19. Methods: A total of 149 HCWs and 36 certain infector-infectee pairs between 19th March 2020 and 1st November 2020 in a university hospital were included in the study. Epidemiological characteristics were recorded. Serial interval and incubation period were estimated using parametric accelerated failure time models. Results: Forty HCWs (26.8%) were detected via contact-based surveillance. Of 100 HCWs epidemiologically linked with a confirmed COVID-19 case, 36 (36%) had contact with a colleague. The median serial interval was 3.93 days (95% CI: 3.17-4.83). Of symptomatic HCWs, 97.5% had developed symptoms 13.71 (95% CI: 9.39-18.73) days after symptom onset of the primary case. The median incubation period was 3.99 (95% CI: 3.25-4.84) days. Of symptomatic HCWs, 97.5% developed symptoms within 9.49 (95% CI: 6.75-12.20) days after infection. Conclusions: The serial interval and the incubation period of COVID-19 in HCWs were shorter than in the general population. Rigorous contact tracing and isolation of infected HCWs could have resulted in shorter serial intervals. Implementation of more stringent in-hospital control measures focussed on transmission between HCWs should be considered. |
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| MeSH term(s) | COVID-19 ; Contact Tracing ; Health Personnel ; Hospitals, University ; Humans ; SARS-CoV-2 | |||||
| Language | English | |||||
| Publishing date | 2021-03-17 | |||||
| Publishing country | England | |||||
| Document type | Journal Article | |||||
| ZDB-ID | 2839775-7 | |||||
| ISSN | 2374-4243 ; 2374-4235 | |||||
| ISSN (online) | 2374-4243 | |||||
| ISSN | 2374-4235 | |||||
| DOI | 10.1080/23744235.2021.1900599 | |||||
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| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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