Influenza B viruses with site-specific mutations introduced into the HA gene.


We have succeeded in engineering changes into the genome of influenza B virus. First, model RNAs containing the chloramphenicol acetyltransferase gene flanked by the noncoding sequences of the HA or NS genes of influenza B virus were transfected into cells which were previously infected with an influenza B helper virus. Like those of the influenza A viruses… (More)


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