Not long after came a 'scientists statement' signed by Ralph Baric that went further. Baric has worked at WIV on GoF experiments.

Hmmm... possibly....

But how would he have known about the sickened WIV researchers? If it is him, either he was on site when it happened or someone gave him the information. If we can establish that he was not on site at the time, then either it wasn't him or someone gave him the information.

Like patient 0, who is source 0 in this case?

Of course, Baric could be the primary source for US intelligence regardless of his location at the time of the event, but if he were not on site, that would indicate someone perhaps knowingly passing on sensitive information rather than talk around the water cooler if he were on site. So there is a difference there.