So many germs have to come up with lots of tricks to spread among those who might fall victim to it, and many of them are what we perceive as “symptoms of disease.” Cats She Lived Happily Ever After poster. We have created our own tricks to cope with, and in turn germs come up with new tricks to combat our own. We and our pathogens are now locked in an evolutionary race of evolution in which those who lose will pay the price of death, and natural selection will play a key role. fortune. Let us now consider the form of this rivalry: lightning war or guerrilla warfare?