If the pressure is right, the virus should evolve to be less lethal. If the virus kills its host before infecting a new host, then that evolution is not advantageous. This is why low contact was a good tactic for COVID. Only the strains that were less lethal would continue and out complete the ones that kill people.

Unfortunately I doubt that he would mandate a good management of this. In a environment like barn chickens live in, the virus can transmit so regularly that the lethality is not a pressure for it.