| 1. |
- Bjork, J., et al.
(författare)
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Surveillance of COVID-19 vaccine effectiveness: a real-time case-control study in southern Sweden
- 2022
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Ingår i: Epidemiology and Infection. - : Cambridge University Press (CUP). - 0950-2688 .- 1469-4409. ; 150
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Tidskriftsartikel (refereegranskat)abstract
- The extensive register infrastructure available for coronavirus disease 2019 surveillance in Scania county, Sweden, makes it possible to classify individual cases with respect to hospitalisation and disease severity, stratify on time since last dose and demographic factors, account for prior infection and extract data for population controls automatically. In the present study, we developed a case-control sampling design to surveil vaccine effectiveness (VE) in this ethnically and socioeconomically diverse population with more than 1.3 million inhabitants. The first surveillance results show that estimated VE against hospitalisation and severe disease 0-3 months after the last dose remained stable during the study period, but waned markedly 6 months after the last dose in persons aged 65 years or over.
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| 2. |
- Kahn, F., et al.
(författare)
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Risk of severe COVID-19 from the Delta and Omicron variants in relation to vaccination status, sex, age and comorbidities- surveillance results from southern Sweden, July 2021 to January 2022
- 2022
-
Ingår i: Eurosurveillance. - 1025-496X. ; 27:9
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Tidskriftsartikel (refereegranskat)abstract
- We compared the risk of severe COVID-19 during two periods 2021 and 2022 when Delta and Omicron, respectively, were the dominating virus variants in Scania county, Sweden. We adjusted for differences in sex, age, comorbidities, prior infection and vaccina-tion. Risk of severe disease from Omicron was mark-edly lower among vaccinated cases. It was also lower among the unvaccinated but remained high (> 5%) for older people and middle-aged men with two or more comorbidities. Efforts to increase vaccination uptake should continue.
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| 3. |
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