Impact of influenza vaccination programmes among the elderly population on primary care, Portugal, Spain and the Netherlands: 2015/16 to 2017/18 influenza seasons.

Machado, A, Mazagatos, C., Dijkstra, F., Kislaya, I., Gherasim, A., McDonald, S.A., Kissling, E., Valenciano, M., Meijer, A., Hooiveld, M., Nunes, B., Larrauri, A. Impact of influenza vaccination programmes among the elderly population on primary care, Portugal, Spain and the Netherlands: 2015/16 to 2017/18 influenza seasons. Eurosurveillance: 2019, 24(45)