How big a population is the blogger talking about. Conventional vaccine manufacture techniques require months to manufacture millions of doses. I doubt that number of doses could be prepared without tipping off the CIA and other intelligence organizations.
“Terrorists can prepare a vaccine to protect themselves and their host populations in advance of its release.”
Any country or group been doing a lot of new vaccinating lately?
Lots of missing lab created viruses in the world. CDC & WHO are troubled they could be in the hands of terrorist or “incompetants”.