They'll let us know after the 4 year trial is done.
Here's the trial schedule for the Pfizer jab, latter part of Phase 1 and all of Phase 2 & 3, evidently being run concurrently.
Four years total and it was just started last year. https://media.tghn.org/medialibrary/2020/11/C4591001_Clinical_Protocol_Nov2020_Pfizer_BioNTech.pdf
We are the trial participants. Kinda brings new meaning to the phrase; "We're all in this together"
“We all have a death wish together.”
I know someone who claims this (bleeding/unexpected period) happened to her twice. Both occured after being near a person who had recently received the Pfizer vac. about 1-3 days after having contact with the newly vaccinated individual-After each of the 2 shots.
Weird.