ArticleEuro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin2022
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.
Article in Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers, 4 of them syntheses that pooled it.
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
62 citing papers in PubMed, 4 syntheses or guidelines pooled it.
- Systematic review of post-COVID condition in Nordic population-based registry studies.Nature communications · 2025Pooled it
- Role of previous infection with SARS-CoV-2 in protecting against omicron reinfections and severe complications of COVID-19 compared to pre-omicron variants: a systematic review.BMC infectious diseases · 2023Pooled it
- Outcomes of Elderly Patients Hospitalized with the SARS-CoV-2 Omicron B.1.1.529 Variant: A Systematic Review.International journal of environmental research and public health · 2023Pooled it
- Facing the Omicron variant-how well do vaccines protect against mild and severe COVID-19? Third interim analysis of a living systematic review.Frontiers in immunology · 2022Pooled it
- A Cross-Sectional Study Shows Emergence of the Delta, 19B, 20A, 20B, 19A, and Omicron Variants of SARS-CoV-2 in Burkina Faso: A Conundrum Within a Conundrum.Health science reports · 2026Article
- Heterologous mucosal vaccine boosting enhances mucosal and systemic immunity by distinct mechanisms.The Journal of experimental medicine · 2026Article
- Barriers and motivators associated with COVID-19 vaccination-a vaccine acceptance scoring system based on a population survey in southern Sweden.European journal of public health · 2025Article
- Longitudinal analysis of Covid-19 infection trends and in-hospital mortality across six pandemic waves in Tunisia.Archives of public health = Archives belges de sante publique · 2025Article
- Planning and adjusting the COVID-19 booster vaccination campaign to reduce disease burden.Infectious Disease Modelling · 2025Article
- Detection of SARS-CoV-2 Variants Imported Through Land Borders at the Height of the COVID-19 Pandemic in Ghana, 2022.Cureus · 2024Article
- Updated Surveillance Metrics and History of the COVID-19 Pandemic (2020-2023) in Europe: Longitudinal Trend Analysis.JMIR public health and surveillance · 2024Article
- COVID-19 pandemic - Cocktail of variants, a study from Northern India.Journal of family medicine and primary care · 2024Article
- Comparative severity of COVID-19 cases caused by Alpha, Delta or Omicron SARS-CoV-2 variants and its association with vaccination.Enfermedades infecciosas y microbiologia clinica (English ed.) · 2024Article
- Article
- Laboratory Diagnostics Accuracy for COVID-19 versus Post-COVID-19 Syndrome in Lung Disease Patients with Multimorbidity.Journal of personalized medicine · 2024Article
- SARS-CoV-2 Infection, Vaccination and Risk of Death in People with An Oncological Disease in Northeast Italy.Journal of personalized medicine · 2023Article
- Changing Severity and Epidemiology of Adults Hospitalized With Coronavirus Disease 2019 (COVID-19) in the United States After Introduction of COVID-19 Vaccines, March 2021-August 2022.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2023Article
- Comparison of clinical outcomes, demographic, and laboratory characteristics of hospitalized COVID-19 patients during major three waves driven by Alpha, Delta, and Omicron variants in Tehran, Iran.Influenza and other respiratory viruses · 2023Article
- COVID-19 vaccine effectiveness against symptomatic infection and hospitalisation in Belgium, July 2021 to May 2022.Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin · 2023Article
- Association of SARS-CoV-2 Nucleocapsid Protein Mutations with Patient Demographic and Clinical Characteristics during the Delta and Omicron Waves.Microorganisms · 2023Article
2 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
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 vaccination. Risk of severe disease from Omicron was markedly 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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