It has been said results were never published. Most think it might be from companies hiding it because it killed all the animals.
But it could also be that it was deemed classified also because it killed all the animals. As it would be a very good bioweapon. People that did research would be under severe gag order to keep results secret.
I went looking for this yesterday, everything popped up as "Fake News" or "Debunked." There is a video from the hearings in Texas where they said it out loud, but I cannot find where it is documented. I didnt dig too far, but would love to read about it.
What search engines were you using? I'll try to take a gander later when time allows.