Yamane N, Hiratsuka M, Arikawa J, Odagiri T, Ishida N. Antibody responses after repeated influenza A virus immunizations among schoolchildren in Japan.
J Hyg (Lond) 1981;
87:383-92. [PMID:
7310122 PMCID:
PMC2134136 DOI:
10.1017/s002217240006962x]
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Abstract
Antibody responses to influenza virus immunizations were examined among junior high school students. The students received two doses of a commercial split-product vaccine containing influenza A H1N1 during a 2-year period following the first appearance of H1N1 virus in the winter of 1977-78. In haemagglutination-inhibition (HI) tests, the students who had been infected with H1N1 virus in 1977-78 showed a better response and wider cross-reactivity to the drift strain than the students who had not experienced earlier H1N1 influenza infection. Neuraminidase-inhibition (NAI) antibody titres after immunization depended upon a history of natural infection with H1N1 virus, since students not previously infected showed no significant NAI antibody rise after immunization.
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