TY - GEN AU - Pyhälä,R AU - Aho,K TI - Seroepidemiology of H1N1 influenza: the infection and re-infection rate in winter 1978-79 SN - 0022-1724 PY - 1981///0413 KW - Adolescent KW - Adult KW - Age Factors KW - Aged KW - Antibodies, Viral KW - analysis KW - Child KW - Disease Outbreaks KW - epidemiology KW - Female KW - Finland KW - Genetic Variation KW - Humans KW - Influenza A Virus, H1N1 Subtype KW - Influenza A virus KW - genetics KW - Influenza, Human KW - Male KW - Pregnancy KW - Recombination, Genetic N1 - Publication Type: Case Reports; Journal Article; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1017/s0022172400068716 ER -