SARS CoV-2 reinfection rate is higher in the Omicron variant than in the Alpha and Delta variants

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dc.authoridAcer, Omer/0000-0002-5314-0475
dc.authoridOzudogru, Osman/0000-0003-1212-2251
dc.contributor.authorOzudogru, Osman
dc.contributor.authorBahce, Yasemin Genc
dc.contributor.authorAcer, Omer
dc.date.accessioned2024-12-24T19:24:54Z
dc.date.available2024-12-24T19:24:54Z
dc.date.issued2023
dc.departmentSiirt Üniversitesi
dc.description.abstractBackground and objectives Many mutations in variants for instance Delta and Alpha are associated with immune evasion and higher infectious potential. There are uncertainties regarding Omicron. In this regard, we aimed to compare the frequency of reinfection of SARS CoV-2 variants in our hospital between April 22, 2021 and January 26, 2022. Method The reinfection rates and demographic characteristics of a total of 27,487 COVID-19 patients infected with different SARS CoV-2 variants were examined. Results Reinfection was found in 26 (0.46%) of 5554 Alpha, 209 (1.16%) of 17,941 Delta, and 520 (13.0%) of 3992 Omicron variants. A statistically significant difference was observed between the reinfection rates of the variants (p = 0.000). The mean reinfection days were calculated as 204.4 +/- 51.1 in the Alpha variant, 291.2 +/- 58.2 in the Delta variant, and 361.2 +/- 131.6 in the Omicron variant (p = 0.000). It was observed that 16.5% of reinfection cases caught COVID-19 for the second time 3-6 months after the first COVID-19 infection, 36.7% after 6-12 months, and 46.8% after more than 12 months. There was a significant difference between the times in reinfection cases. Most reinfections occurred more than 12 months apart. Among those with a reinfection time > 12 months, 0% had Alpha, 3.4% had Delta, and 96.6% had Omicron variants. Conclusion The highest reinfection rate was observed in the Omicron variant. Reinfection was approximately 30 times more frequent in the Omicron variant than in the Alpha variant and 10 times more frequent in the Delta variant.
dc.identifier.doi10.1007/s11845-022-03060-4
dc.identifier.endpage756
dc.identifier.issn0021-1265
dc.identifier.issn1863-4362
dc.identifier.issue2
dc.identifier.pmid35711013
dc.identifier.scopus2-s2.0-85132178477
dc.identifier.scopusqualityQ1
dc.identifier.startpage751
dc.identifier.urihttps://doi.org/10.1007/s11845-022-03060-4
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6185
dc.identifier.volume192
dc.identifier.wosWOS:000811986900001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherSpringer London Ltd
dc.relation.ispartofIrish Journal of Medical Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.subjectAlpha
dc.subjectDelta
dc.subjectOmicron
dc.subjectReinfection
dc.subjectVariant
dc.titleSARS CoV-2 reinfection rate is higher in the Omicron variant than in the Alpha and Delta variants
dc.typeArticle

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