@kurz_gesagt: You are a living, breathing ecosystem made of up to 40 trillion cells. This metropolis of flesh is home to the human microbiome, another 40 trillion bacteria that have a contract with your body: They get to live here and, in return, they break down your meals. To keep their numbers in check, your body's ecosystem needs a group of deadly predators: Viruses. At least ten trillion. Let's look at the wild world of the human virome. #kurzgesagt #inanutshell #kurzgesagt_inanutshell #sciencetok #virome #virus #human #biologytok