I'm still going to call my flu shot, a flu shot, so there jab!
But jab has really taken over in the past week or so here.
I don't like the idea of being jabbed, though when I think of it, shot could sound pretty violent too.
Maybe we could say we got our Vaxx today

Nothing jabby or shooty there
This is like an argument here with an aquaintance ages ago over what you call those draught stoppers, in our house we called them a snake, in their house they called them a sausage.
I might start saying vaxx and see if I can get a trend going.