as part of a study into the molecular basis of attenuation and reversion to neurovirulence in the sabin poliovirus vaccines , we have determined the complete nucleotide sequence of a cloned dna copy of the genome of p3/leon/37 , the neurovirulent progenitor of the type 3 sabin vaccine strain , p3/leon 12a1b .
C0032374
poliovirus vaccines
C0032375
sabin vaccine