Looking at the timelines Nader was out before the warning letter was sent. So this is not the reason he was fired .
Back when Cytodyn was making headway in the Philippines, they were shut down by the first FDA warning letter. In fact the timing was perfect to harm Cytodyn.
What is Cytodyn close to accomplishing now ? We don't know as they have been quiet however, someone in the industry caught wind of something because they are using the same tactic to shut whatever it is down.
Can't have Cytodyn succeeding and creating stress for the big pharmas can we ?