This inquiry came to me via a support group, where a patient with a PSA of 1.5 shot up to 4.1 just after the AstraZenica jab, and was back to 1.5 a month later.
Then I realised the same had probably happened to me. Mine has been <0.01 for almost 2 years on hormone therapy, but a test I had done 2 days after the AstraZenica came back as 0.03, and two months later back to <0.01. There were other things I originally thought might be responsible (and could still be), such as being a PSA test by post in a different lab.
If this effect turns out to be a thing, it's worth people knowing about it and scheduling PSA tests and vaccinations appropriately.
Sorry, I hadn't noticed the other thread on this, Covid vacc and raised PSA, which seems to also be raising this as a possibility