come up with a timeline for when and possibly where sars—co—v—2 may have spilled over from animals. there's also the fact this has happened a number of times before, most notably with the sars outbreak in china in 2003, and middle east respiratory syndrome or mers which jumped into camels and then into humans in saudi arabia. we have seen similar events, spill—over events, but there also molecular evidence from evolutionary studies that at least three of the four seasonal coronaviruses, if not all of them, really originated from the animal world. so there is really a track record of coronaviruses doing this, so that's why i think it is really still the most likely explanation. my name is dominic dwyer. so there is really a track record of coronaviruses doing this, so that's why i think it is really still the most likely explanation.