| antigenic and biochemical characterization of poliovirus type 1 isolates. | by the introduction of sabin oral poliovirus vaccine, the circulation of wild type polioviruses has virtually disappeared in japan. however, an outbreak of poliomyelitis associated with sporadic transmission of type 1 wild strain occurred in nagano in 1980. furthermore, we found that some type 1 wild strains were introduced into japan from abroad in 1981. in recent surveys, the two poliovirus type 1 isolates which have non-vaccine-like antigenic character were detected in aichi. then, an investi ... | 1987 | 3039316 |