Reduction in hospital admissions for pneumonia in non-institutionalised elderly people as a result of influenza vaccination: a case-control study in Spain.
J. Puig-barbera, S. Marquez-calderon, A. Masoliver-fores, F. Lloria-paes, A. Ortega-dicha, M. Gil-martin, M. J. Calero-martinezYear:
1997
Language:
english
DOI:
10.1136/jech.51.5.526
File:
PDF, 1.02 MB
english, 1997