emerging infectious disease with a high mortality rate it's also viral and there's no vaccine transcona hartsays an epidemiologist at germany's federal research institute for animal health. humans some of the responsibility is because we're going. into the preserve of wild animals. that were before now reserved for animals on their natural habitats. but now agriculture is encroaching because more and more animal protein is needed to feed more and more people. and this means more opportunities for contact with wildlife or. the transmission of pathogens can occur directly from animal to human or via intermediate species known as vectors in epidemiology it's estimated that 60 percent of diseases in humans are not sick that is have jumped to us from animals including. as much as 2 that causes kovac 19. viruses invade cells in their hosts whether animals or humans and then replicate producing lots more virus particles. the cells often die as a result the virus spreads in the host body and can infect up as many viruses don't actually make you sick others of course do cases can range from miles to