There were and still are few players such as Large Scale Biology Corp that developed lymphoma vaccine using plant transient expression systems back in the 90's…
Coincidentally, the denouement of LSBC is mentioned in the thread on IBIO due to the involvement of Robert Erwin with both companies (#msg-68217804).
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”