TY - T1 - Seasonal influenza vaccines induced high levels of neutralizing cross-reactive antibody responses against different genetic group influenza A(H1N1)pdm09 viruses SN - / UR - http://hdl.handle.net/10138/312891 T3 - A1 - Haveri, Anu; Ikonen, Niina; Kantele, Anu; Anttila, Veli-Jukka; Ruotsalainen, Eeva; Savolainen-Kopra, Carita; Julkunen, Ilkka A2 - PB - Y1 - 2019 LA - eng AB - Influenza A(H1N1)pdm09 viruses have been circulating throughout the world since the 2009 pandemic. A/California/07/2009 (H1N1) virus was included in seasonal influenza vaccines for seven years altogether, providing a great opportunity to analyse vaccine-induced immunity in relation to the postpandemic evolution of the A(H1N1)pdm09 virus. Serum antibodies against various epidemic strains of influenza A (H1N1)pdm09 viruses were measured among health care workers (HCWs) by haemagglutination inhibit... VO - IS - SP - OP - KW - Antibodies; Microneutralization test; Humoral immunity; Influenza A; Pandemic; Vaccine; HEMAGGLUTINATION INHIBITION; H1N1 2009; ANTIGENIC STRUCTURE; PHASE-III; IMMUNOGENICITY; SAFETY; VACCINATION; CANDIDATE; CHILDREN; A(H3N2); 3111 Biomedicine; 1183 Plant biology, microbiology, virology; 3121 General medicine, internal medicine and other clinical medicine N1 - PP - ER -