Took them long enough... Horse de-wormer

From the NIH's own website - notice the bottom right corner:

Been taking it regularly for the last two-plus years.  I had one mild cold last fall but that has been it.  I am out in public a lot so I am getting exposed to whatever is out there.  Anecdotal evidence for sure but it sure works for me.

For them to admit that it is being "evaluated" shows that they knew all along.