| previous h1n1 influenza a viruses circulating in the mongolian population. | four influenza a viruses of the subtype h1n1, isolated from mongolian patients in ulaanbaatar between 1985 and 1991, were analysed by sequencing of various rna segments. the isolate from 1985 was found to be highly related in all genes sequenced to strains isolated from camels in the same region and at about the same time. these camel isolates were presumably derived from a uv-light inactivated reassortant vaccine (pr8 x ussr/77) prepared in leningrad in 1978 and used in the mongolian population ... | 1996 | 8856033 |