they did not. in the case of tessier-levigne, who was responsible for getting him out of there? not the NIH. it was a fucking Stanford undergrad journalism student.
let that sink in. a heroically persistent undergrad had to do the job that the NIH was morally and legally obligated to do.
this "science is self correcting" trope needs to stop being propagated right now. and you can claim eventual self consistency if it resolves a hundred years from now, which would obviously be too little too late. how many people were hurt, how much research dollars were wasted in the meantime. "well, Eventually" is not good enough, and the self correcting slogan is just running cover for entreched interests in the face of their misdeeds.