I had 2 roommates and worked in a radar site with no windows. I was the only one who got it, nor did I spread it to anyone else. How does that work?
Fomites from some infected git that didn’t wash his hands, could have been picked up literally anywhere.
6 months from vax to infection is way too long for the vax to be the source of infection but it is long enough for the immune response to wane, or for the influenza virus to mutate and evade the vax derived immunity.
That your roommates and coworkers didn’t get it from you says your mama taught you right.
gr8eman Pliskin, I thought you were dead,...not retired.
BTW, was that radar site in Korea or Germany?