The authors regret that there was an error in two dates in Table 1, which includes autumn 2023 national COVID-19 vaccination campaign dates by study site. We update here the date for Germany, which was 18 September 2023, and for Navarre, Spain, which was 16 October, 2023. These dates were used in the analysis, so the error in Table 1 does not affect results or findings. The corrected Table 1 is as follows:
Table 1. Autumn 2023 national COVID-19 vaccination campaign, vaccination and recruitment information, by study site, VEBIS primary care study, September 2023–January 2024
| Study sites included in the analysis | Start of autumn 2023 national COVID-19 vaccination campaigns | Age-specific recommendation for COVID-19 vaccination for older adults | Data source for COVID-19 vaccination information | Case definition used for recruitment of patientsb |
|---|---|---|---|---|
| Croatia | 18 Sep 2023 | 65 | Medical records, vaccination registry, GP interview (self-report) | EU-ILI or EU-ARI |
| France | 2 Oct 2023 | 65 | GP interview (self-report) | Sentinelles ARI |
| Germany | 18 Sep 2023 | 60 | Medical records, patient’s certificate of vaccination, GP interview (self-report) | ARI |
| Hungary | 1 Oct 2023 | 60 | National Immunisation Registry (83.5%), GP records, self-report | EU-ARI |
| Ireland | 2 Oct 2023 | 50 | Data linkage to vaccine registry | EU-ARI |
| The Netherlands | 2 Oct 2023 | 60 | GP interview (self-report) | EU-ILI or EU-ARI |
| Portugal | 29 Sep 2023 | 60 | Vaccine registry look-up by GPs | EU-ARI |
| Spain, national | 25 Sep 2023 | 60 | Data linkage to vaccine registry | EU-ARI |
| Spain, Navarre region c | 16 Oct 2023 | 60 | Data linkage to vaccine registry | EU-ILI |
| Sweden | 7 Nov 2023 | 65 | Data linkage to vaccine registry | EU-ARI |
ARI: acute respiratory infection; EU: European Union; ILI: influenza-like illness; VEBIS: Vaccine Effectiveness, Burden and Impact Studies.
a Romania was excluded from the analysis due to too small a sample size (<10 cases).
b EU-ARI: Sudden onset of symptoms and at least one of four respiratory symptoms (cough, sore throat, shortness of breath, coryza) and a clinician’s judgement that the illness is due to an infection; EU-ILI: Sudden onset of symptoms and at least one of four systemic symptoms (fever or feverishness, malaise, headache, or myalgia) and at least one of three respiratory symptoms (cough, sore throat, or shortness of breath); Sentinelles ARI: Sudden onset of fever (or feverishness), and respiratory signs; The ARI case definition in Germany includes patients with at least one of the following four symptoms: fever, cough, coryza or sore throat.
c Some vaccination may have taken place from 25 September 2023.
The authors would like to apologise for this oversight and for any inconvenience caused.