Too many variables to draw conclusions. We got them last week, Moderna, only issue was pain in the arm for 2 days. I even got the flu shot in that same arm. I did not miss any workouts either.
i think blood type, medical history, age, what your previous shot was, how long ago you received the original shot etc.
i think blood type, medical history, age, what your previous shot was, how long ago you received the original shot etc.