out. dr. fauci actually said recently that he is not confident this occurred naturally and the lab theory requires more investigation. so it is important to note that we don't know, and neither does the u.s. intelligence community, for that matter, what the researchers got sick with. their symptoms were consistent with symptoms of coronavirus but they were consistent with other technical illnesses. things like the flu, for example. so the intention community does not know whether they had covid-19 and that is why they had to seek hospital care. but, of course, that's something that the biden administration and the international community has said needs more investigation. >> yeah. exactly. they're not eliminating it. more open to the lab escape theory than before. david, the china government's typical response is to deny, deny, deny. that's what they're doing here. do they have any evidence to back that denial?