TY - JOUR AU - Sanz, Ivan AU - Rojo Rello, Silvia AU - Tamames, Sonia AU - Eiros Bouza, José María AU - Ortiz de Lejarazu Leonardo, Raúl PY - 2018 SN - 1742-4933 UR - http://uvadoc.uva.es/handle/10324/45044 AB - Background and methods Elderly people have experienced several influenza natural infections and seasonal vaccinations during their lives. The aim of this work was to evaluate in an elderly Spanish population the presence of antibodies (Abs) against... LA - eng PB - BMC KW - Anticuerpos KW - Influenza TI - Antibodies against 1940s era a/H1N1 influenza strains a/Weiss/43 and a/FM/1/47 and heterotypic responses after seasonal vaccination of an elderly Spanish population DO - 10.1186/s12979-018-0116-9 ER -