@article{:/content/10.2807/ese.14.39.19344-en, author = "Pérez-Trallero, E and Piñeiro, L and Vicente, D and Montes, M and Cilla, G", title = "Residual immunity in older people against the influenza A(H1N1) – recent experience in northern Spain", journal = "Eurosurveillance", year = "2009", volume = "14", number = "39", eid = 19344, pages = "", url = "https://www.eurosurveillance.org/content/10.2807/ese.14.39.19344-en", doi = "https://doi.org/10.2807/ese.14.39.19344-en" }