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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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/content/10.2807/1560-7917.ES.2022.27.9.2200121
2022-03-03
2024-04-27
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2022.27.9.2200121
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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
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Fredrik+Kahn&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Kahn Fredrik</a>, <a href="/search?value1=Carl+Bonander&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Bonander Carl</a>, <a href="/search?value1=Mahnaz+Moghaddassi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Moghaddassi Mahnaz</a>, <a href="/search?value1=Magnus+Rasmussen&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Rasmussen Magnus</a>, <a href="/search?value1=Ulf+Malmqvist&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Malmqvist Ulf</a>, <a href="/search?value1=Malin+Inghammar&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Inghammar Malin</a>, <a href="/search?value1=Jonas+Bj%C3%B6rk&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Björk Jonas</a></span>. 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. <a href="/content/ecdc">Euro Surveill.</a> 2022;27(9):pii=2200121. <a href="https://doi.org/10.2807/1560-7917.ES.2022.27.9.2200121" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2022.27.9.2200121</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 03 Feb 2022;&nbsp;&nbsp; <span class="generated">Accepted</span>: 28 Feb 2022 </span> </p>
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