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Characterization of the NYVAC-C-Δ3 revertant viruses. RT-PCR analysis of RNA from BSC-40 cells infected with the NYVAC-C-Δ3 B15R-rev and NYVAC-C-Δ3 A52R-rev revertants (Rev) (1 PFU per cell, 24 h) confirms the correct B15R (A) and A52R (B) gene reinsertion and transcription.
