Right now, the entire world is thinking and talking about diseases. Why do they appear? How should we prevent them? And what are some of the most important diseases in history?Come see if you know as much as you think about humanity’s relationship to our tiniest enemies, pathogens. The relationship is weirder and more amazing than you might think!如今，疾病成为了全世界人们思考和讨论的焦点。疾病是怎么产生的？我们该如何预防？人类历史上有哪些重大的疾病？一起来聊聊全人类的敌人，病原体。它是最小的，却也是最危险的！它与人类的关系比你想象的更怪异，更令人惊奇！