FIG 3.

MPXV replication in the presence of IFN. (A) RK13 cells were treated with increasing amounts of IFN-α A/D for 18 h and then infected with 100 PFU of MPXV. Cells were stained at 48 hpi with crystal violet. (B) Subconfluent BSC-40 cells were treated with the indicated amount of recombinant IFN for 18 h prior to infection. Treated cells were infected with approximately 100 PFU of VACV, EMCV, or MPXV. Cells were stained with crystal violet at 48 hpi.