A New Jersey Vaccine and a/Fm 1/47 Epidemics

H1N1 influenza and old people

“…A titre of/>40 was generally regarded as a protective level useful in estimating the susceptibility of a population to H3N2 viruses. This titre was also used by many authors to estimate susceptibility to the recent H1 N1 viruses [1,[7][8][9]. The low prevalence of both pre-epidemic and post-epidemic antibodies in old people in the present study suggests that during the H1N1 epidemic in 1977178, a lower titre than in previous H3N2 epidemics of pre-epidemic homologous HI antibodies was required for protection.…”

Antibody responses after repeated influenza A virus immunizations among schoolchildren in Japan

“…In the studies on Hswl immunization, it was demonstrated that individuals who received New Jersey Hswl immunization responded to the USSR HI strain, especially those primed with the HI antigen (Masurel & Andre, 1978;Sarateanu & Ehrengut, 1978;Foy et al 1980). In the same way, those who had been infected with HINI virus and then were given the HINI vaccine showed significant HI reactivity to Hswl antigen.…”