Right, myocarditis, i got the name wrong. You're probably right but still, when an emergency situation requires a solution built from scratch and involves tens of billions of taxpayer money i get a bit skeptical... especially if the goalpost seems to be moving in favor of accelerated spending (recent raise in the price of the vaccines).
Anyway, i read that Oxford studies show that vaccines lose around 35% effectiveness against D in 3 months from the second shot.