Suboptimal influenza vaccine uptake among healthcare workers in a regional reference hospital in Spain, 2017¿2018. Need for new approaches R. Ruiz-Montero; R. Ortiz-González Serna; B.R. Guzmán-Herrador; J.L. Barranco Quintana; F.J. Gavilán León; I. Salcedo Leal; R. Torcello Gaspar; M.J. Romero Muñoz; C. Díaz Molina;