Yes, but I think the OP makes a very fair point, and it's impossible to rationalize about events that took place a century ago and graft them into today's situa

Yes, but I think the OP makes a very fair point, and it's impossible to rationalize about events that took place a century ago and graft them into today's situation with all sorts of other unknowns. In particular, some of the 'historical' vaccines were almost entirely about preventing individual infection, whereas we're now facing clearly a very systematic issue and we have an odd problem of ~90% thresholds for achieving certain kinds of tipping points etc. (of course that remains to be seen but theoretically there's an opportunity there). That said, it doesn't mean that there hasn't been an ideological shift or even some kind of political nuance in the organization. Both can be true, I'd guess that's at least a little bit the case.