Body hair stopped growing 2yrs post treatment? Maybe Pfizer side affect?

Thank you.
 I don’t mind not having to shave under my arms etc but am worried re my head hair as it’s naturally very fine. I was trying to grow it but think I should just settle for shorter.
 I thought of the Pfizer today as I cannot remember when I last shaved under my armpits and the reaction at the time wasn’t great. It’s probably nothing to do with it.