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Jiménez-Sepúlveda N, Gras-Valentí P, Chico-Sánchez P, Castro-García JM, Ronda-Pérez E, Vanaclocha H, Peiró S, Burgos JS, Ana Berenguer, Navarro D, Sánchez-Payá J. Effectiveness of mRNA booster doses in preventing infections and hospitalizations due to SARS-CoV-2 and its dominant variant over time in Valencian healthcare workers, Spain. Vaccine 2024; 42:4011-4021. [PMID: 38760269 DOI: 10.1016/j.vaccine.2024.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/09/2024] [Accepted: 05/10/2024] [Indexed: 05/19/2024]
Abstract
OBJECTIVE This study aimed to evaluate the effectiveness of SARS-CoV-2 mRNA vaccines in preventing infection and hospitalization among healthcare workers (HCWs) in the Valencian Community (Spain), considering vaccination timing, dose number, and predominant variant. METHODS A test-negative case-control design estimated vaccine effectiveness against symptomatic disease and hospitalization due to SARS-CoV-2. HCWs who underwent PCR or antigen testing for SARS-CoV-2 from January 2021 to March 2022 were included. Cases had a positive diagnostic test, while controls had negative tests. Adjusted vaccine effectiveness (aVE) was calculated using the formula: aVE = (1 - Odds ratio) × 100. RESULTS During the Delta variant's predominance, aVE against infection within 12-120 days post-second dose was 64.8 % (BNT162b2) and 59.4 % (mRNA-1273), declining to 21.2 % and 42.2 %, respectively, after 120 days. For the Omicron variant, aVE within 12-120 days post-second dose was 61.1 % (BNT162b2) and 85.1 % (mRNA-1273), decreasing to 36.7 % and 24.9 %, respectively, after 120 days. After a booster dose of mRNA-1273, aVE was 64.0 % (BNT162b2 recipients) and 65.9 % (initial mRNA-1273 recipients). Regardless of variant, aVE for hospitalization prevention after 2 doses was 87.0 % (BNT162b2) and 89.0 % (mRNA-1273). CONCLUSION The administration of two doses of Moderna-mRNA-1273 against SARS-CoV-2 in HCWs proved to be highly effective in preventing infections and hospitalizations in the first 120 days after the second dose during the predominance of the Omicron variant. The decline in VE after 120 days since the administration of the second dose was significantly restored by the booster dose administration. This increase in VE was greater for the Pfizer vaccine. COVID-19 hospitalization prevention remained stable with both mRNA vaccines throughout the study period.
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Affiliation(s)
- Natali Jiménez-Sepúlveda
- Epidemiology Unit, Preventive Medicine Service, Dr. Balmis General University Hospital, Alicante Institute for Health and Biomedical Research (ISABIAL), Alicante, Spain
| | - Paula Gras-Valentí
- Epidemiology Unit, Preventive Medicine Service, Dr. Balmis General University Hospital, Alicante Institute for Health and Biomedical Research (ISABIAL), Alicante, Spain; Preventive Medicine and Public Health Area, Faculty of Health Sciences, University of Alicante, Alicante, Spain
| | - Pablo Chico-Sánchez
- Epidemiology Unit, Preventive Medicine Service, Dr. Balmis General University Hospital, Alicante Institute for Health and Biomedical Research (ISABIAL), Alicante, Spain; Preventive Medicine and Public Health Area, Faculty of Health Sciences, University of Alicante, Alicante, Spain.
| | | | - Elena Ronda-Pérez
- Preventive Medicine and Public Health Area, Faculty of Health Sciences, University of Alicante, Alicante, Spain; Centre of Networked Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Hermelinda Vanaclocha
- General Directorate of Public Health, Department of Health, Valencia Government, Valencia, Spain
| | - Salvador Peiró
- Foundation for the Promotion of Health and Biomedical Research of the Valencian, Community (FISABIO), Valencia, Spain
| | - Javier S Burgos
- General Directorate of Research and Healthcare Supervision, Department of Health, Valencia Government, Valencia, Spain
| | - Ana Berenguer
- General Directorate of Analysis and Public Policy, Valencia Government, Valencia, Spain
| | - David Navarro
- Microbiology Service, Clinic University Hospital, INCLIVA Health Research Institute, Valencia, Spain; Department of Microbiology, School of Medicine, University of Valencia, Valencia, Spain
| | - José Sánchez-Payá
- Epidemiology Unit, Preventive Medicine Service, Dr. Balmis General University Hospital, Alicante Institute for Health and Biomedical Research (ISABIAL), Alicante, Spain
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Seppälä E, Dahl J, Veneti L, Rydland KM, Klüwer B, Rohringer A, Meijerink H. Covid-19 and influenza vaccine effectiveness against associated hospital admission and death among individuals over 65 years in Norway: A population-based cohort study, 3 October 2022 to 20 June 2023. Vaccine 2024; 42:620-628. [PMID: 38142215 DOI: 10.1016/j.vaccine.2023.12.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/04/2023] [Accepted: 12/17/2023] [Indexed: 12/25/2023]
Abstract
BACKGROUND Co-circulation of SARS-CoV-2 and influenza virus can lead to double epidemics and increased pressure on health systems. To evaluate the effect of both vaccines, we estimated the adjusted vaccine effectiveness (aVE) of influenza and Covid-19 vaccines against related severe disease in the elderly population in Norway during the 2022/2023 season. METHODS In this population-based cohort study, we included data from the Emergency preparedness register for Covid-19 (Beredt C19) on all individuals ≥ 65 years living in Norway between 3 October 2022 and 20 June 2023. Using Cox-proportional hazard models, we estimated aVE of both influenza and Covid-19 vaccines (bivalent BA.1 and BA.4-5) against associated hospitalisation and death. Vaccine status was included as a time-varying covariate and all models were adjusted for potential confounders, including the other vaccine. RESULTS We identified 2,437 influenza-associated hospitalisations and 178 deaths, alongside 5,824 Covid-19-associated hospitalisations and 621 deaths. The aVE was highest in the first three months after receiving either vaccine. Against influenza-associated hospitalisation the aVE was 34 % (26 %-42 %) among 65-79-year-olds and 40 % (30 %-48 %) among ≥ 80-year-olds, and 6.6 % (-64 %-47 %) and 37 % (0.5 %-61 %) against influenza-associated death, respectively. The aVE against Covid-19-associated hospitalisation was 65 % (61 %-69 %) among 65-79-year-olds and 55 % (49 %-60 %) among ≥ 80-year-olds (compared to having received the vaccine ≥ 180 days ago). Similarly, the aVE against Covid-19-associated death was 68 % (48 %-80 %) and 78 % (65 %-86 %), respectively. For Covid-19 we show a reduction in aVE with time since dose. CONCLUSION Covid-19 and influenza vaccines reduced the risk of severe disease in the same high-risk population. Ensuring high uptake of both vaccines could thus limit the overall health care burden.
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Affiliation(s)
- Elina Seppälä
- Department of Infection Control and Vaccines, Norwegian Institute of Public Health, Oslo, Norway
| | - Jesper Dahl
- Department of Infection Control and Vaccines, Norwegian Institute of Public Health, Oslo, Norway
| | - Lamprini Veneti
- Department of Infection Control and Preparedness, Norwegian Institute of Public Health, Oslo, Norway
| | | | - Birgitte Klüwer
- Department of Infection Control and Vaccines, Norwegian Institute of Public Health, Oslo, Norway
| | - Andreas Rohringer
- Department of Virology, Norwegian Institute of Public Health, Oslo, Norway
| | - Hinta Meijerink
- Department of Infection Control and Vaccines, Norwegian Institute of Public Health, Oslo, Norway.
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Seegers V, Rousseau G, Zhou K, Blanc-Lapierre A, Bigot F, Mahammedi H, Lambert A, Moreau-Bachelard C, Campone M, Conroy T, Penault-Llorca F, Bellanger MM, Raoul JL. COVID-19 Infection despite Previous Vaccination in Cancer Patients and Healthcare Workers: Results from a French Prospective Multicenter Cohort (PAPESCO-19). Cancers (Basel) 2023; 15:4777. [PMID: 37835471 PMCID: PMC10571737 DOI: 10.3390/cancers15194777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/15/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
In a multicenter prospective cohort of cancer patients (CP; n = 840) and healthcare workers (HCWs; n = 935) vaccinated against COVID-19, we noticed the following: i/after vaccination, 4.4% of HCWs and 5.8% of CP were infected; ii/no characteristic was associated with post-vaccine COVID-19 infections among HCWs; iii/CP who developed infections were younger, more frequently women (NS), more frequently had gastrointestinal, gynecological, or breast cancer and a localized cancer stage; iv/CP vaccinated while receiving chemotherapy or targeted therapy had (NS) more breakthrough infections after vaccination than those vaccinated after these treatments; the opposite was noted with radiotherapy, immunotherapy, or hormonotherapy; v/most COVID-19 infections occurred either during the Alpha wave (11/41 HCW, 20/49 CP), early after the first vaccination campaign started, or during the Omicron wave (21/41 HCW, 20/49 CP), more than 3 months after the second dose; vi/risk of infection was not associated with values of antibody titers; vii/the outcome of these COVID-19 infections after vaccination was not severe in all cases. To conclude, around 5% of our CPs or HCWs developed a COVID-19 infection despite previous vaccination. The outcome of these infections was not severe.
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Affiliation(s)
- Valérie Seegers
- Department of Biostatistics, Institut de Cancérologie de l’Ouest, 44805 Saint-Herblain, France; (V.S.); (A.B.-L.)
| | - Guillaume Rousseau
- Department of Biopathology, Institut de Cancérologie de l’Ouest, 49055 Angers, France;
| | - Ke Zhou
- Department of Human and Social Sciences, Institut de Cancérologie de l’Ouest (ICO), 44805 Saint-Herblain, France; (K.Z.); (M.M.B.)
| | - Audrey Blanc-Lapierre
- Department of Biostatistics, Institut de Cancérologie de l’Ouest, 44805 Saint-Herblain, France; (V.S.); (A.B.-L.)
| | - Frédéric Bigot
- Department of Medical Oncology, Institut de Cancérologie de l’Ouest, 49055 Angers, France;
| | - Hakim Mahammedi
- Department of Medical Oncology, Centre Jean Perrin, 63011 Clermont-Ferrand, France;
| | - Aurélien Lambert
- Department of Medical Oncology, Institut de Cancérologie de Lorraine, 54511 Vandoeuvre-lès-Nancy, France; (A.L.); (T.C.)
| | - Camille Moreau-Bachelard
- Department of Medical Oncology, Institut de Cancérologie de l’Ouest, 44805 Saint-Herblain, France; (C.M.-B.); (M.C.)
| | - Mario Campone
- Department of Medical Oncology, Institut de Cancérologie de l’Ouest, 44805 Saint-Herblain, France; (C.M.-B.); (M.C.)
| | - Thierry Conroy
- Department of Medical Oncology, Institut de Cancérologie de Lorraine, 54511 Vandoeuvre-lès-Nancy, France; (A.L.); (T.C.)
| | | | - Martine M. Bellanger
- Department of Human and Social Sciences, Institut de Cancérologie de l’Ouest (ICO), 44805 Saint-Herblain, France; (K.Z.); (M.M.B.)
- Department of Social Sciences, EHEPS School of Public Health, 35043 Rennes, France
| | - Jean-Luc Raoul
- Department of Clinical Research, Institut de Cancérologie de l’Ouest, 44805 Saint-Herblain, France
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