And what metrics can we make for the impact on the immunity of the species as a whole, if the susceptible ones are medicinally prevented from succumbing to diseases?
The question I guess I am asking is what 'safe' means on the generational timescale. If we prevent 10 million people dying now through mass vaccination, and this leads to 20 million dying over the next generation as their inherited immunological weaknesses create an ever growing population of susceptible hosts that medicines cannot save, I'm asking if there is a point where we may end up breeding a super bug for which no-one can resist and for which no prophylactic medicines can be created?
I'm not suggesting we should not try, but I am suggesting that's a pretty important outcome which we should seek to measure if we are going to try it.
If the helicopter rescue is the first ever attempted, then OK, we take it as a risky thing to try out. But once we have made 100 such mountain rescues, one would be sensible to look at the success rates. If 99 of the 100 flights crashed, then you would take that metric and say 'oh, no, a helicopter rescue is not wise'. How are we assessing the risk impact on the long term survivability of the species? Are we so sure that the use of vaccines is of no impact on such generational survivability, and if there is an argument that we don't need to look, then how is that conclusion formed?
I'm not 'anti-vaccines', I take them because it is what 'we modern people do'. I'm asking a longer term question regarding the evolution of the 'adaptive response' (as
@Ygggdrasil helpfully discriminated from the humoral response in #35). If we end up evolving to rely on artificial representations of diseases to stimulate humoral response, and our front line adaptive responses are muted, that doesn't sound like a great thing over time. We won't see anything for several generations, of course. But we may then begin to see diseases which affect progressively larger fractions of the populations at anyone time. Are we seeing this already?
I'm not going to post further on this because I realize this is going to be contentious and I have put forward the scientific question; what is the metric for measuring the impact of vaccinations on generational immunity? Beyond that, the prospect of measuring whether saving a person now and risking several in the future is heading off into ethics and too problematic to address. So I'll not contribute further on this thought.