This publication has been produced by Antimicrobial Resistance and Healthcare Associated Infection (ARHAI) Scotland, part of NHS National Services Scotland. ARHAI publications are not made available under terms of the OGL.

About this release

This release provides data for COVID-19 hospital onset cases in Scotland from week ending 1 March 2020 to week ending 24 July 2022. A system for monitoring COVID-19 is critical to tracking hospital transmission. This helps to inform infection prevention and control measures. The transmission of COVID-19 is thought to occur mainly through respiratory droplets generated by coughing and through contact with contaminated surfaces. Further information on the epidemiology of COVID-19 in healthcare settings can be found on the Public Health Scotland website.

Due to the cessation of almost all population for SARS-CoV-2 at the end of April 2022, the inclusion of community onset cases in this report has been discontinued.

Main points

Breakdown of COVID-19 cases by hospital onset status – weekly data

The total number of hospital onset COVID-19 cases reported to ARHAI Scotland this week (week ending 24 July 2022) was 685. Of these:

  • 387 (56.5% of all hospital onset COVID-19 cases) were reported as non-hospital onset (first positive specimen of COVID-19 episode on day 1 or 2 of admission to NHS board), of which 48 (12.4% of non-hospital onset cases) were reinfections. In the previous week (week ending 17 July 2022) there were 425 (52.1% of all hospital onset COVID-19 cases), of which 36 (8.5% of non-hospital onset cases) were reinfections.
  • 84 (12.3% of all hospital onset COVID-19 cases) were reported as indeterminate hospital onset (first positive specimen of COVID-19 episode on days 3 to 7 of admission to NHS board), of which 6 (7.1% of indeterminate hospital onset cases) were reinfections. In the previous week (week ending 17 July 2022) there were 91 (11.2% of all hospital onset COVID-19 cases), of which 7 (7.7% of indeterminate hospital onset cases) were reinfections.
  • 72 (10.5% of all hospital onset COVID-19 cases) were reported as probable hospital onset (first positive specimen of COVID-19 episode on days 8 to 14 of admission to NHS board), of which 5 (6.9% of probable hospital onset cases) were reinfections. In the previous week (week ending 17 July 2022) there were 73 (9.0% of all hospital onset COVID-19 cases), of which 7 (9.6% of probable hospital onset cases) were reinfections.
  • 142 (20.7% of all hospital onset COVID-19 cases) were reported as definite hospital onset (first positive specimen of COVID-19 episode 15 or more days after admission to NHS board), of which 17 (12.0% of definite hospital onset cases) were reinfections. In the previous week (week ending 17 July 2022) there were 226 (27.7% of all hospital onset COVID-19 cases), of which 27 (11.9% of definite hospital onset cases) were reinfections.

Figure 1: Epidemic curve of COVID-19 cases with first positive specimen of COVID-19 episode taken during an inpatient stay, by onset status: week-ending 01 March 2020 to week-ending 24 July 2022 (n=41,886). 1,2

1. Source of data are Corporate Data Warehouse (CDW) that contains test results from Electronic Communication of Surveillance in Scotland (ECOSS) and Rapid Admission Preliminary Inpatient Data (RAPID) or local admission data.
2. Data include any reinfection episodes from samples taken during an inpatient stay in hospital

Background

Antimicrobial Resistance and Healthcare Associated Infection (ARHAI) Scotland, part of National Services Scotland, works closely with Public Health Scotland to deliver the COVID-19 response. Local and national monitoring in hospital settings is required to reduce COVID-19 infections.

Further information

The next release of this publication will be 24 August 2022

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Older versions of this publication

Versions of this publication released before 16 March 2020 may be found on the Data and Intelligence, Health Protection Scotland or Improving Health websites.

Last updated: 07 October 2022
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