Kevin, this is nothing new. Two historical events are important to add into this discussion:.
1a) In the 60's and 70s, the then regulatory body, the Division of Biologics Standards in the NIH, knew that the SALK (and later Sabin) vaccines were contaminated with a vacuolating virus in 1957, but they shut down Dr Bernice Eddy's research down and silenced her until Sweet and Hilleman published their work on SV40 in 1960. So during all those years, the adenovirus vaccines, the early measles vaccines and the polio vaccines all had - at the very LEAST - a virus called SV 40. There were at least 56 SV40 viruses known by 1964, to have been identified by 1964.
1b) The Canadian vaccine company, Connaught, sent all their vaccine to New Zealand for a pittance fee, KNOWING from 1960, that it had SV40 in it, and from 1956 - 1964, New Zealand was knowingly saturated with SV40 contaminated vaccine, and the sent a letter to the government saying that it was easy to get rid of SV40 using baking soda.
That is the sentence version of that story though. There is so much more that could be said.
Regulatory capture and pharmaceutical company underhandedness has always existed, so this is tactic of information deletion, is nothing new.