Other vaccines have passed all trials. We know their safety profiles. Those with only the slightest interest in biotechs would know how stringent trials are. They know how high the fail rate is. Covid vaccines not only didn't go through those trials, the biotechs offered no proper transparency. Heck, the US Supreme Court had to intervene to see the hidden data that was unavailable for 55 years. The Covid vaccines were NOT approved vaccines, period.