I think it'd make more sense to view the entire infrastructure as the bio weapon, rather than imagine it being a single release of some biological agent. All the investment and round-the-clock effort to control the information...it wouldn't make sense to think it was all for a one time event when so much could throw it off track. Instead, I think the real value they are aiming to get out of this investment is the wide spread "trust" of this new system. The majority of first-world countries now trust the new DNA altering technology and believe it is a "vaccine" exactly like the concoctions of the past (because most already trust those as being worth the risk). They still have some work to do to firm up the trust of these mRNA jabs, but if achieved they will have continual back door access to the genetic machinery of a large part of the human race. Once everyone is comfortable with routine injections of RNA messages, the general population will be more like general computers receiving genetic programs written by the highest bidder in the elite world.