https://www.nytimes.com/2020/10/05/u...imes&smtyp=cur
No clinical trial in the United States has yet advanced far enough to prove that any vaccine is safe and effective, although Pfizer, one vaccine developer, is hoping for interim results soon from its trial.
This may explain why so many on the left and right are hesitant to get the vaccine when it first comes out. The White House doesn't want to follow medical guidelines and want it pushed through.