Effectiveness of complete primary vaccination against COVID-19 at primary care and community level during predominant Delta circulation in Europe: multicentre analysis, I-MOVE-COVID-19 and ECDC networks, July to August 2021

Introduction: In July and August 2021, the SARS-CoV-2 Delta variant dominated in Europe. Aim: Using a multicentre test-negative study, we measured COVID-19 vaccine effectiveness (VE) against symptomatic infection. Methods: Individuals with COVID-19 or acute respiratory symptoms at primary care/community level in 10 European countries were tested for SARS-CoV-2. We measured complete primary course overall VE by vaccine brand and by time since vaccination. Results: Overall VE was 74% (95% CI: 69–79), 76% (95% CI: 71–80), 63% (95% CI: 48–75) and 63% (95% CI: 16–83) among those aged 30–44, 45–59, 60–74 and ≥ 75 years, respectively. VE among those aged 30–59 years was 78% (95% CI: 75–81), 66% (95% CI: 58–73), 91% (95% CI: 87–94) and 52% (95% CI: 40–61), for Comirnaty, Vaxzevria, Spikevax and COVID-19 Vaccine Janssen, respectively. VE among people 60 years and older was 67% (95% CI: 52–77), 65% (95% CI: 48–76) and 83% (95% CI: 64–92) for Comirnaty, Vaxzevria and Spikevax, respectively. Comirnaty VE among those aged 30–59 years was 87% (95% CI: 83–89) at 14–29 days and 65% (95% CI: 56–71%) at ≥ 90 days between vaccination and onset of symptoms. Conclusions: VE against symptomatic infection with the SARS-CoV-2 Delta variant varied among brands, ranging from 52% to 91%. While some waning of the vaccine effect may be present (sample size limited this analysis to only Comirnaty), protection was 65% at 90 days or more between vaccination and onset.

Description

Multicentre Study
I-MOVE-COVID-19 and ECDC primary care study team (in addition to authors above): Katica Čusek Adamić, Ivana Ferenčak, Bernard Kaić, Mirjana Lana Kosanović Ličina, Danijela Lakošeljac, Ivana Mihin Huskić, Diana Nonković, Nick Andrews, Jamie Lopez Bernal, Joanna Ellis, Heather Whitaker, Thierry Blanchon,, Caroline Guerrisi,, Titouan Launay,, Shirley Masse,, Sylvie van der Werf, Vincent Enouf, John Cuddihy, Lois O’Connor, Adele McKenna, Michael Joyce, Cillian de Gascun, Joanne Moran, Rianne van Gageldonk-Lafeber, Susan J Hahné, Hester E de Melker, Ewout B Fanoy, Stijn Raven, Marit Middeldorp, Irina Kislaya, Baltazar Nunes, Rita Roquete, Adriana Silva, Aryse Melo, Inês Costa, Nuno Verdasca, Patrícia Conde, Amélia Soeiro, Maria Elena Mihai, Iulia Bistriceanu, Alina Ivanciuc, Diana Dintoi, Catalina Pascu, Adrian Jidovu, Debbie Sigerson, Diogo FP Marques, Anna Molesworth, Leanne Quinn, Miranda Leyton, Selin Campbell, Janine Thoulass, Jim McMenamin, Inmaculada Casas Flecha, Ana Martínez Mateo, Daniel Castrillejo, Eva María Martínez Ochoa, Carmen Quiñones Rubio, Concepción Delgado-Sanz, Jesús Oliva, Ana Miqueleiz, Ana Navascués, Camino Trobajo-Sanmartín, Carmen Ezpeleta, Paula López Moreno, Javier Gorricho, Eva Ardanaz, Fernando Baigorria, Aurelio Barricarte, Cristina Burgui, Enrique de la Cruz, Nerea Egüés, Manuel García Cenoz, Marcela Guevara, Conchi Moreno-Iribas, Carmen Sayón, Pasi Penttinen, Christiana Carstairs

Keywords

COVID-19 SARS-CoV-2 Delta Variant Multicentre Study Test-negative Design Vaccine Effectiveness Europe Vacina Efetividade Infecções Respiratórias Cuidados de Saúde Europa I-MOVE