Son waited for the Johnson and Johnson.. waited because it was a one time thing, plus not supposed to get side affects. Well, he got real sick. Found out the next day that Colorado had closed an area giving them..out of an abundance of caution, because they after all weren't supposed to get dizzy or nauseous. That's all those folks had. Now..blood clots. Only a few. More people get clots and die with the Covid. Heart attacks. I have a friend that got covid. She started having pain in her left side. Thought, well, I have covid, don't ignore it. Went to the hospital. Yep, big ol clot. They told her that she was smart, coming early saved her, that a lot of folks put it off and died because clots headed for the heart.