I had never encountered the initialism "FFU" (used in the graph you reproduced), so I looked it up. For anyone else's benefit, it's Focus Forming Units, the equivalent of the plaques I was taught about back in biology school during the dark ages (1980s) for viruses that don't lyse their host cells.
Thanks, as always.
I had never encountered the initialism "FFU" (used in the graph you reproduced), so I looked it up. For anyone else's benefit, it's Focus Forming Units, the equivalent of the plaques I was taught about back in biology school during the dark ages (1980s) for viruses that don't lyse their host cells.