Kissling, E., Hooiveld, M., Martin, V., Martínez-Baz, I., William, N., Vilcu, A., Mazagatos, C., de Lusignan, S., Meijer, A., Machando, A., Brytting, M., Casado, I., Murray, J., Behillil, S., Larrauri, A., O'Donnell, J., Tsang, R., de Lange, M., Rodrigues, A., Riess, M., Castilla, J., Hamilton, M., Falchi, A., Pozo, F., Dunford, L., Cogdale, J., Jansen, T., Guiomar, R., Enkirch, T., Burgui, C., Sigerson, D., Blanchon, T., Ochoa, E., Connell, J., Ellis, J., van Gageldonk-Lafeber, R., Kislaya, I., Rose, A., Valenciano, M. & team, I. 2021, 'Vaccine effectiveness against symptomatic SARS-CoV-2 infection in adults aged 65 years and older in primary care: I-MOVE-COVID-19 project, Europe, December 2020 to May 2021', Eurosurveillance, 26(29). https://doi.org/10.2807/1560-7917.ES.2021.26.29.2100670