inside the lab in china and maybe others. >> that's true, harris. i want to give my own take on this. the n.i.h.'s explanation is a little different -- it is worse in a way. the deputy director there is saying gain-of-function research means that it is not that you alter a virus or a virus is altered or a mouse gets sicker. it is a human gets sicker. that's parsing words. what looks like what was going on in the lab is they were tweaking or altering coronaviruss so they could more easily attach in a mouse that was humanized to cells that would infect a human, that would infect a human. that to me by my definition is gain-of-function research. you know, how that occurred doesn't mean that it was bioengineered. it could mean it was serial passage. the virus goes through a mouse repeatedly and here is something that your viewers may