which leads to perhaps the most crucial parts of a successful investigation. access, and trust. >> if we can convince the scientists in china, in wuhan, to sit down with us and share everything that they have, and we likewise share everything that we have with them, i really do think that we can make some headway. >> it's worth pointing out that the lab leaks do occur. in the uk in 1978, smallpox. and others, that occurs. the big question is, the type of research that is happening there oftentimes makes these viruses more efficient in humans. is it worthwhile research, and can we hold people accountable? that is the big question. >> sanjay, thank you. up next, what don mcgahn