It seems that with medical scandals (as well as in other fields), the first impulse that the Establishment has is to cover the matter up.
It seems that those directly involved in the cover-up have to have left the scene before the truth is finally admitted.
Something similar is happening just now, with the truth coming out about how the American National Institutes of Health funded gain-of-function research in Wuhan, contrary to what Dr. Fauci swore under oath to the Senate some years ago.