 Animal viruses tend to do very well within the animal and don't transmit as well with humans. If you mutate them, like we believe that the lab in Wuhan mutated COVID-19 to make it more transmissible, then an animal virus all of a sudden shows up in humans and spreads like wildfire. That was COVID-19. So one of the arguments for why we think it was manipulated in the lab is that most animal viruses, like the first SARS-1 back in 2003,