Drugs and Food Safety Regulations

How do we know that bar knew that the h v was in the medicine, and yet they continued to sell it? I sont understand how a company of that magnitude, a, could come back from a scandal like this. And these are recording the minutes of 19 85, a 19 85 meeting between the fta and bar yes. It does seem that fda regulators did collude to keep the continued sales hidden so that this could be solved without allerting congress, the medical community and the public.