TY - GEN AU - de Bruijn,I A AU - Remarque,E J AU - Beyer,W E AU - le Cessie,S AU - Masurel,N AU - Ligthart,G J TI - Annually repeated influenza vaccination improves humoral responses to several influenza virus strains in healthy elderly SN - 0264-410X PY - 1997///1023 KW - Adult KW - Age Factors KW - Aged KW - Antibodies, Viral KW - blood KW - Hemagglutination Inhibition Tests KW - Humans KW - Influenza Vaccines KW - immunology KW - Orthomyxoviridae KW - Vaccination N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/s0264-410x(97)00019-4 ER -