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- Early COVID‐19 XBB.1.5 Vaccine Effectiveness Against Hospitalisation Among Adults Targeted for Vaccination, VEBIS Hospital Network, Europe, October 2023–January 2024Publication . Antunes, Liliana; Mazagatos, Clara; Martínez‐Baz, Iván; Naesens, Reinout; Borg, Maria‐Louise; Petrović, Goranka; Fatukasi, Terra; Jancoriene, Ligita; Machado, Ausenda; Oroszi, Beatrix; Husa, Petr; Lazar, Mihaela; Dürrwald, Ralf; Howard, Jennifer; Melo, Aryse; Pérez‐Gimeno, Gloria; Castilla, Jesús; Bernaert, Eva; Džiugytė, Aušra; Makarić, Zvjezdana Lovrić; Fitzgerald, Margaret; Mickienė, Auksė; Gómez, Verónica; Túri, Gergő; Součková, Lenka; Marin, Alexandru; Tolksdorf, Kristin; Nicolay, Nathalie; Rose, Angela M.C.; European Hospital Vaccine Effectiveness GroupWe conducted a multicentre test-negative case–control study covering the period from October 2023 to January 2024 among adult patients aged ≥18 years hospitalised with severe acute respiratory infection in Europe. We provide early estimates of the effectiveness of the newly adapted XBB.1.5 COVID-19 vaccines against PCR-confirmed SARS-CoV-2 hospitalisation. Vaccine effectiveness was 49% overall, ranging between 69% at 14–29days and 40% at 60–105days post vaccination. The adapted XBB.1.5 COVID-19 vaccines conferred protection against COVID-19 hospitalisation in the first 3.5months post vaccination, with VE>70% in older adults (≥65 years) up to 1month post vaccination.
- Effectiveness of the adapted bivalent mRNA COVID-19 vaccines against hospitalisation in individuals aged ≥ 60 years during the Omicron XBB lineage-predominant period: VEBIS SARI VE network, Europe, February to August, 2023Publication . Antunes, Liliana; Mazagatos, Clara; Martínez-Baz, Iván; Gómez, Verónica; Borg, Maria-Louise; Petrović, Goranka; Duffy, Róisín; Dufrasne, François E; Dürrwald, Ralf; Lazar, Mihaela; Jancoriene, Ligita; Oroszi, Beatrix; Husa, Petr; Howard, Jennifer; Melo, Aryse; Pozo, Francisco; Pérez-Gimeno, Gloria; Castilla, Jesús; Machado, Ausenda; Džiugytė, Aušra; Karabuva, Svjetlana; Fitzgerald, Margaret; Fierens, Sébastien; Tolksdorf, Kristin; Popovici, Silvia-Odette; Mickienė, Auksė; Túri, Gergő; Součková, Lenka; Nicolay, Nathalie; Rose, Angela MC; on behalf of the European Hospital Vaccine Effectiveness GroupThe European Medicines Agency (EMA) authorised four adapted bivalent mRNA COVID-19 vaccines for use against COVID-19 in September/October 2022: Comirnaty (BNT162b2; Pfizer-BioNTech) and Spikevax (mRNA-1273; Moderna) Original/Omicron BA.1 and Original/Omicron BA.4–5 [1]. During autumn 2022, all European Union/European Economic Area (EU/EEA) countries had vaccination campaigns in place to administer a booster dose, with several countries using the adapted bivalent vaccines [2]. The Omicron-descendent XBB lineage and XBB.1.5 sub-lineage became variants of interest in March 2023 [3]. We estimated the effectiveness of the COVID-19 bivalent vaccines against hospitalisation with PCR-confirmed SARS-CoV-2 infection among patients aged ≥ 60 years with severe acute respiratory infection (SARI) during the XBB lineage-predominant period.
- Effectiveness of the XBB.1.5 COVID-19 Vaccines Against SARS-CoV-2 Hospitalisation Among Adults Aged ≥ 65 Years During the BA.2.86/JN.1 Predominant Period, VEBIS Hospital Study, Europe, November 2023 to May 2024Publication . Antunes, Liliana; Rojas-Castro, Madelyn; Lozano, Marcos; Martínez-Baz, Iván; Leroux-Roels, Isabel; Borg, Maria-Louise; Oroszi, Beatrix; Fitzgerald, Margaret; Dürrwald, Ralf; Jancoriene, Ligita; Machado, Ausenda; Petrović, Goranka; Lazar, Mihaela; Součková, Lenka; Bacci, Sabrina; Howard, Jennifer; Verdasca, Nuno; Basile, Luca; Castilla, Jesús; Ternest, Silke; Džiugytė, Aušra; Túri, Gergő; Duffy, Roisin; Hackmann, Carolin; Kuliese, Monika; Gomez, Verónica; Makarić, Zvjezdana Lovrić; Marin, Alexandru; Husa, Petr; Nicolay, Nathalie; Rose, Angela M.C.; VEBIS SARI VE network teamWe estimated the effectiveness of the adapted monovalent XBB.1.5 COVID-19 vaccines against PCR-confirmed SARS-CoV-2 hospitalisation during the BA.2.86/JN.1 lineage-predominant period using a multicentre test-negative case-control study in Europe. We included older adults (≥ 65 years) hospitalised with severe acute respiratory infection from November 2023 to May 2024. Vaccine effectiveness was 46% at 14-59 days and 34% at 60-119 days, with no effect thereafter. The XBB.1.5 COVID-19 vaccines conferred protection against BA.2.86 lineage hospitalisation in the first 4 months post-vaccination.
- Effectiveness of the XBB.1.5 COVID-19 Vaccines Against SARS-CoV-2 Hospitalisation Among Adults Aged ≥ 65 Years During the BA.2.86/JN.1 Predominant Period, VEBIS Hospital Study, Europe, November 2023 to May 2024Publication . Antunes, Liliana; Rojas-Castro, Madelyn; Lozano, Marcos; Martínez-Baz, Iván; Leroux-Roels, Isabel; Borg, Maria-Louise; Oroszi, Beatrix; Fitzgerald, Margaret; Dürrwald, Ralf; Jancoriene, Ligita; Machado, Ausenda; Petrović, Goranka; Lazar, Mihaela; Součková, Lenka; Bacci, Sabrina; Howard, Jennifer; Verdasca, Nuno; Basile, Luca; Castilla, Jesús; Ternest, Silke; Džiugytė, Aušra; Túri, Gergő; Duffy, Roisin; Hackmann, Carolin; Kuliese, Monika; Gomez, Verónica; Makarić, Zvjezdana Lovrić; Marin, Alexandru; Husa, Petr; Nicolay, Nathalie; Rose, Angela M. C.; VEBIS SARI VE network teamWe estimated the effectiveness of the adapted monovalent XBB.1.5 COVID-19 vaccines against PCR-confirmed SARS-CoV-2 hospitalisation during the BA.2.86/JN.1 lineage-predominant period using a multicentre test-negative case-control study in Europe. We included older adults (≥ 65 years) hospitalised with severe acute respiratory infection from November 2023 to May 2024. Vaccine effectiveness was 46% at 14-59 days and 34% at 60-119 days, with no effect thereafter. The XBB.1.5 COVID-19 vaccines conferred protection against BA.2.86 lineage hospitalisation in the first 4 months post-vaccination.
- Vaccine effectiveness against COVID-19 hospitalisation in adults (≥ 20 years) during Alpha- and Delta-dominant circulation: I-MOVE-COVID-19 and VEBIS SARI VE networks, Europe, 2021Publication . Rose, Angela M.C.; Nicolay, Nathalie; Sandonis Martín, Virginia; Mazagatos, Clara; Petrović, Goranka; Niessen, F Annabel; Machado, Ausenda; Launay, Odile; Denayer, Sarah; Seyler, Lucie; Baruch, Joaquin; Burgui, Cristina; Loghin, Isabela I.; Domegan, Lisa; Vaikutytė, Roberta; Husa, Petr; Panagiotakopoulos, George; Aouali, Nassera; Dürrwald, Ralf; Howard, Jennifer; Pozo, Francisco; Sastre-Palou, Bartolomé; Nonković, Diana; Knol, Mirjam J.; Kislaya, Irina; Luong Nguyen, Liem binh; Bossuyt, Nathalie; Demuyser, Thomas; Džiugytė, Aušra; Martínez-Baz, Iván; Popescu, Corneliu; Duffy, Róisín; Kuliešė, Monika; Součková, Lenka; Michelaki, Stella; Simon, Marc; Reiche, Janine; Otero-Barrós, María Teresa; Lovrić Makarić, Zvjezdana; Bruijning-Verhagen, Patricia C.J.L.; Gómez, Verónica; Lesieur, Zineb; Barbezange, Cyril; Van Nedervelde, Els; Borg, Maria-Louise; Castilla, Jesús; Lazar, Mihaela; O’Donnell, Joan; Jonikaitė, Indrė; Demlová, Regina; Amerali, Marina; Wirtz, Gil; Tolksdorf, Kristin; Valenciano, Marta; Bacci, Sabrina; Kissling, Esther; I-MOVE-COVID-19 Hospital Study Team; VEBIS Hospital Study TeamIntroduction: Two large multicentre European hospital networks have estimated vaccine effectiveness (VE) against COVID-19 since 2021. Aim: We aimed to measure VE against PCR-confirmed SARS-CoV-2 in hospitalised severe acute respiratory illness (SARI) patients ≥ 20 years, combining data from these networks during Alpha (March–June)- and Delta (June–December)-dominant periods, 2021. Methods: Forty-six participating hospitals across 14 countries follow a similar generic protocol using the test-negative case–control design. We defined complete primary series vaccination (PSV) as two doses of a two-dose or one of a single-dose vaccine ≥ 14 days before onset. Results: We included 1,087 cases (538 controls) and 1,669 cases (1,442 controls) in the Alpha- and Delta-dominant periods, respectively. During the Alpha period, VE against hospitalisation with SARS-CoV2 for complete Comirnaty PSV was 85% (95% CI: 69–92) overall and 75% (95% CI: 42–90) in those aged ≥ 80 years. During the Delta period, among SARI patients ≥ 20 years with symptom onset ≥ 150 days from last PSV dose, VE for complete Comirnaty PSV was 54% (95% CI: 18–74). Among those receiving Comirnaty PSV and mRNA booster (any product) ≥ 150 days after last PSV dose, VE was 91% (95% CI: 57–98). In time-since-vaccination analysis, complete all-product PSV VE was > 90% in those with their last dose < 90 days before onset; ≥ 70% in those 90–179 days before onset. Conclusions: Our results from this EU multi-country hospital setting showed that VE for complete PSV alone was higher in the Alpha- than the Delta-dominant period, and addition of a first booster dose during the latter period increased VE to over 90%.
- Vaccine effectiveness against COVID-19 hospitalisation in adults (≥ 20 years) during Omicron-dominant circulation: I-MOVE-COVID-19 and VEBIS SARI VE networks, Europe, 2021 to 2022Publication . Rose, Angela M.C.; Nicolay, Nathalie; Sandonis Martín, Virginia; Mazagatos, Clara; Petrović, Goranka; Baruch, Joaquin; Denayer, Sarah; Seyler, Lucie; Domegan, Lisa; Launay, Odile; Machado, Ausenda; Burgui, Cristina; Vaikutyte, Roberta; Niessen, F Annabel; Loghin, Isabela I.; Husa, Petr; Aouali, Nassera; Panagiotakopoulos, George; Tolksdorf, Kristin; Horváth, Judit Krisztina; Howard, Jennifer; Pozo, Francisco; Gallardo, Virtudes; Nonković, Diana; Džiugytė, Aušra; Bossuyt, Nathalie; Demuyser, Thomas; Duffy, Róisín; Luong Nguyen, Liem binh; Kislaya, Irina; Martínez-Baz, Iván; Gefenaite, Giedre; Knol, Mirjam J.; Popescu, Corneliu; Součková, Lenka; Simon, Marc; Michelaki, Stella; Reiche, Janine; Ferenczi, Annamária; Delgado-Sanz, Concepción; Lovrić Makarić, Zvjezdana; Cauchi, John Paul; Barbezange, Cyril; Van Nedervelde, Els; O’Donnell, Joan; Durier, Christine; Guiomar, Raquel; Castilla, Jesús; Jonikaite, Indrė; Bruijning-Verhagen, Patricia C.J.L.; Lazar, Mihaela; Demlová, Regina; Wirtz, Gil; Amerali, Marina; Dürrwald, Ralf; Kunstár, Mihály Pál; Kissling, Esther; Bacci, Sabrina; Valenciano, Marta; I-MOVE-COVID-19 hospital study team; VEBIS hospital study team; Members of the I-MOVE-COVID-19 and VEBIS hospital study teams (in addition to authors above)Introduction: The I-MOVE-COVID-19 and VEBIS hospital networks have been measuring COVID-19 vaccine effectiveness (VE) in participating European countries since early 2021. Aim: We aimed to measure VE against PCR-confirmed SARS-CoV-2 in patients ≥ 20 years hospitalised with severe acute respiratory infection (SARI) from December 2021 to July 2022 (Omicron-dominant period). Methods: In both networks, 46 hospitals (13 countries) follow a similar test-negative case-control protocol. We defined complete primary series vaccination (PSV) and first booster dose vaccination as last dose of either vaccine received ≥ 14 days before symptom onset (stratifying first booster into received < 150 and ≥ 150 days after last PSV dose). We measured VE overall, by vaccine category/product, age group and time since first mRNA booster dose, adjusting by site as a fixed effect, and by swab date, age, sex, and presence/absence of at least one commonly collected chronic condition. Results: We included 2,779 cases and 2,362 controls. The VE of all vaccine products combined against hospitalisation for laboratory-confirmed SARS-CoV-2 was 43% (95% CI: 29-54) for complete PSV (with last dose received ≥ 150 days before onset), while it was 59% (95% CI: 51-66) after addition of one booster dose. The VE was 85% (95% CI: 78-89), 70% (95% CI: 61-77) and 36% (95% CI: 17-51) for those with onset 14-59 days, 60-119 days and 120-179 days after booster vaccination, respectively. Conclusions: Our results suggest that, during the Omicron period, observed VE against SARI hospitalisation improved with first mRNA booster dose, particularly for those having symptom onset < 120 days after first booster dose.
- Vaccine effectiveness against influenza hospitalisation in adults during the 2022/2023 mixed season of influenza A(H1N1)pdm09, A(H3N2) and B circulation, Europe: VEBIS SARI VE hospital networkPublication . Rose, Angela M. C.; Pozo, Francisco; Martínez‐Baz, Iván; Mazagatos, Clara; Bossuyt, Nathalie; Cauchi, John Paul; Petrović, Goranka; Loghin, Isabela I.; Vaikutyte, Roberta; Buda, Silke; Machado, Ausenda; Duffy, Róisín; Oroszi, Beatrix; Howard, Jennifer; Echeverria, Aitziber; Andreu, Cristina; Barbezange, Cyril; Džiugytė, Aušra; Nonković, Diana; Popescu, Corneliu‐Petru; Majauskaite, Fausta; Tolksdorf, Kristin; Gómez, Verónica; Domegan, Lisa; Horváth, Judit Krisztina; Castilla, Jesús; García, Miriam; Demuyser, Thomas; Borg, Maria‐Louise; Tabain, Irena; Lazar, Mihaela; Kubiliute, Ieva; Dürrwald, Ralf; Guiomar, Raquel; O'Donnell, Joan; Kristóf, Katalin; Nicolay, Nathalie; Bacci, Sabrina; Kissling, Esther; VEBIS SARI VE network team; Belgium SARI Surveillance Network (BelsariNet)We conducted a multicentre hospital-based test-negative case–control study to measure vaccine effectiveness (VE) against PCR-confirmed influenza in adult patients with severe acute respiratory infection (SARI) during the 2022/2023 influenza season in Europe. Among 5547 SARI patients ≥18 years, 2963 (53%) were vaccinated against influenza. Overall VE against influenza A(H1N1)pdm09 was 11% (95% CI: −23–36); 20% (95% CI: −4–39) against A(H3N2) and 56% (95% CI: 22–75) against B. During the 2022/2023 season, while VE against hospitalisation with influenza B was >55%, it was ≤20% for influenza A subtypes. While influenza vaccination should be a priority for future seasons, improved vaccines against influenza are needed.