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Peter JK, Wegner F, Gsponer S, Helfenstein F, Roloff T, Tarnutzer R, Grosheintz K, Back M, Schaubhut C, Wagner S, Seth-Smith HMB, Scotton P, Redondo M, Beckmann C, Stadler T, Salzmann A, Kurth H, Leuzinger K, Bassetti S, Bingisser R, Siegemund M, Weisser M, Battegay M, Sutter ST, Lebrand A, Hirsch HH, Fuchs S, Egli A. SARS-CoV-2 Vaccine Alpha and Delta Variant Breakthrough Infections Are Rare and Mild but Can Happen Relatively Early after Vaccination. Microorganisms 2022; 10:microorganisms10050857. [PMID: 35630302 PMCID: PMC9146960 DOI: 10.3390/microorganisms10050857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 12/14/2022] Open
Abstract
(1) Background: Some COVID-19 vaccine recipients show breakthrough infection. It remains unknown, which factors contribute to risks and severe outcomes. Our aim was to identify risk factors for SCoV2 breakthrough infections in fully vaccinated individuals. (2) Methods: We conducted a retrospective case-control study from 28 December 2020 to 25 October 2021. Data of all patients with breakthrough infection was compared to data of all vaccine recipients in the Canton of Basel-City, Switzerland. Further, breakthrough infections by Alpha- and Delta-variants were compared. (3) Results: Only 0.39% (488/126,586) of all vaccine recipients suffered from a breakthrough infection during the observational period, whereof most cases were asymptomatic or mild (97.2%). Breakthrough infections after full vaccination occurred in the median after 78 days (IQR 47-123.5). Factors with lower odds for breakthrough infection were age (OR 0.987) and previous COVID-19 infection prior to vaccination (OR 0.296). Factors with higher odds for breakthrough infection included vaccination with Pfizer/BioNTech instead of Moderna (OR 1.459), chronic disease (OR 2.109), and healthcare workers (OR 1.404). (4) Conclusions: Breakthrough infections are rare and mild but can occur early after vaccination. This implies that booster vaccination might be initiated earlier, especially for risk groups. Due to new variants emerging repeatedly, continuous monitoring of breakthrough infections is crucial.
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Affiliation(s)
- Jelissa Katharina Peter
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Fanny Wegner
- Applied Microbiology Research, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland; (F.W.); (T.R.); (H.M.B.S.-S.)
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, 4031 Basel, Switzerland
- SIB Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland;
| | - Severin Gsponer
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Fabrice Helfenstein
- Department of Clinical Research, University Hospital Basel, 4031 Basel, Switzerland;
| | - Tim Roloff
- Applied Microbiology Research, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland; (F.W.); (T.R.); (H.M.B.S.-S.)
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, 4031 Basel, Switzerland
- SIB Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland;
| | - Rahel Tarnutzer
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Kerstin Grosheintz
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Moritz Back
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Carla Schaubhut
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Sabina Wagner
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Helena M. B. Seth-Smith
- Applied Microbiology Research, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland; (F.W.); (T.R.); (H.M.B.S.-S.)
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, 4031 Basel, Switzerland
- SIB Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland;
| | - Patrick Scotton
- Corona Vaccination Centre for the Canton of Basel-City, 4058 Basel, Switzerland;
| | - Maurice Redondo
- Viollier AG, 4123 Allschwil, Switzerland; (M.R.); (C.B.); (A.S.); (H.K.); (H.H.H.)
| | - Christiane Beckmann
- Viollier AG, 4123 Allschwil, Switzerland; (M.R.); (C.B.); (A.S.); (H.K.); (H.H.H.)
| | - Tanja Stadler
- Department of Biosystems Science and Engineering, ETH Zurich, 4058 Basel, Switzerland;
| | - Andrea Salzmann
- Viollier AG, 4123 Allschwil, Switzerland; (M.R.); (C.B.); (A.S.); (H.K.); (H.H.H.)
| | - Henriette Kurth
- Viollier AG, 4123 Allschwil, Switzerland; (M.R.); (C.B.); (A.S.); (H.K.); (H.H.H.)
| | - Karoline Leuzinger
- Clinical Virology, University Hospital Basel, 4031 Basel, Switzerland;
- Transplantation & Clinical Virology, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland
| | - Stefano Bassetti
- Internal Medicine, University Hospital Basel, 4031 Basel, Switzerland;
| | - Roland Bingisser
- Emergency Medicine, University Hospital Basel, 4031 Basel, Switzerland;
| | - Martin Siegemund
- Intensive Care Medicine, University Hospital Basel, 4031 Basel, Switzerland;
| | - Maja Weisser
- Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (M.W.); (M.B.); (S.T.S.)
| | - Manuel Battegay
- Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (M.W.); (M.B.); (S.T.S.)
| | - Sarah Tschudin Sutter
- Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (M.W.); (M.B.); (S.T.S.)
| | - Aitana Lebrand
- SIB Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland;
| | - Hans H. Hirsch
- Viollier AG, 4123 Allschwil, Switzerland; (M.R.); (C.B.); (A.S.); (H.K.); (H.H.H.)
- Transplantation & Clinical Virology, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland
- Infectious Diseases and Hospital Epidemiology, University Hospital Basel, University of Basel, 4031 Basel, Switzerland; (M.W.); (M.B.); (S.T.S.)
| | - Simon Fuchs
- Department of Health Basel-City, 4052 Basel, Switzerland; (J.K.P.); (S.G.); (R.T.); (K.G.); (M.B.); (C.S.); (S.W.); (S.F.)
| | - Adrian Egli
- Applied Microbiology Research, Department of Biomedicine, University of Basel, 4056 Basel, Switzerland; (F.W.); (T.R.); (H.M.B.S.-S.)
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, 4031 Basel, Switzerland
- Correspondence:
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