OK, this was effective. I simply helped the normie to understand that they cannot ever have natural immunity against COVID. Then we agreed that the jab wears off in 4 - 8 months. Finally he figured out - he is a lifetime subscriber to re-jabs!
He signed up for the jab "to get it over with." Instead, he's a lifetime subscriber! He's pissed :)
They just want to stop their loved ones getting additional doses in the hopes that something can be done to help them when this is all said and done, it seems pretty likely that the effects of the jab are cumulative and obviously we can latch onto people's apprehension if they have some negative experience to relate to.