12 year olds were in the original trials.
Probably not many. And, apparently not enough.
Though trials seem to be aimed at finding a 1 in 10,000 chance of serious problems, anything over a 1 in 100,000 chance of a problem-like some youngsters have- is somewhat of a failure IMO.
And the kids are themselves at practically no risk to boot.
And about the length of said trials....we don’t know even just a year out how kids’ bodies respond. They are too precious, too low risk for Covid, to be on trial like this on the first place.
I hear about “vaccine evasion” of mutations but never a mention of “social distancing evasion” of mutations.
What strikes me now with Delta’s huge increase in transmissiblity is another cost of lockdowns: they encourage the virus to increase it’s transmissibility. Those strains that don’t are eliminated and those that do are rewarded.
Of course viruses are evolving that way inevitably, but “social distancing” measures- which is all anyone had to use before vaccines- would logically tend to encourage transmissibility.
Voila! ...Delta.
Just a thought too unformed to share perhaps...