they are zoonotic. one other slightly technical term by want to familiarize you with, reservoir host. the reservoir host is the kind of animal in which the bug, virus or whatever it is lives in chemically, permanently, in conspicuously, without causing disease, without causing mayhem in that particular creature. why does it live there? why does it live and on descriptively? probably because it is been in that species for millions of years and accommodation has evolved. a virus in its reservoir host replicates but it doesn't replicate cataclysmic we. it tends to replicate slowly and doesn't generally cause symptoms. it is invisible. it hides in its reservoir host and something happens, humans kill and eat that reservoir host, humans coming contact with it somehow. i will tell a couple stories how this can happen. reservoir host shed the virus and the virus gets into humans and becomes zoonotic. one of the things the scientists do as they study this field and as they focus on these different diseases one

there are these diseases and they spill over, zoonotic and another technical term is a reservoir host. that is the kind of animal which the above or virus lives intimately, permanently, inc onspicuously without causing disease or mayhem. in that particular creature. why doesn't live there non destructively? probably because it has been in that species millions of years and the accommodation has evolved. the virus and reservoir host replicate but not catechist likely but slowly and doesn't generally caused symptoms. it is invisible and hides. then something happens, humans kill and eat that reservoir hose are coming contact with it, i'll tell you a couple of stories how it can happen. the reservoir host sheds the virus and gets into humans then it becomes zoonotic one of the things a scientist do is study the field and focus on the different diseases. first half to identify the reservoir house. new disease in asia killing takes then paid farmers and pig butchers and pork sellers. they isolated a virus and the human victims and the p.i.g.s. have the same virus. this is a true case 1988.

so there are these diseases, the spillover, they are zoonotic. one other time i want familiar familiarizing what is -- a bubba lives in chemically and inconspicuously it occurs without causing mayhem. what causes that? and accommodation has evolved. the virus replicates. but it doesn't replicate cataclysmic we but slowly. it does not generally cause symptoms. it hides in its host and then something happens. humans come in contact with it somehow. the reservoir host gets into humans and then it becomes a zoonotic disease. one of the things that scientists do as they focus on these diseases, they identified the reservoir host. it's killing pick sellers and butchers. it's an isolated virus. the same virus in the human victims and pigs and this is a true case and it happened in 1998. then they went looking for the reservoir host. and they found it in large fruit flies. the disease was finally tracked through the spillover and here's what happened. people were cutting down malaysia for development and agriculture and cutting down the forests. they had

then i heard somebody say, well, why does he take zoonotic so seriously? well, there was very good scientific work in the field and very firm public health measures. isolation of cases, getting the right equipment, getting the right personal protection to the health care workers so that it didn't go further. one of the things i always wonder about is if that disease had emerged in a different place than southern china and hong kong and had gone to different cities then toronto and beijing and singapore, michael history have been different. those are command-and-control cities strong governments and athletic facilities and if that disease emerged in a province of the democratic republic of the congo, it has a lot of disadvantages and the disadvantages would have been probably very consequential or something like sars had come out at that time. .. part of what makes us, the human population and our extension a force of riot damage very dry tinder waiting for a spark. i mentioned the case in malaysia, the fact that pigs were kept in these huge outdoor compoun