This vaccine is built on a new paradigm, so we are in uncharted waters. Early-adopters and the cautious will organically separate into experimental & control groups, respectively. That will help the study, too.
Being on the maiden voyage of the Titanic does not appeal to everybody.
Just the first two mRNA vaccines are...the others coming are not.
AstraZeneca's vaccine is basically the same as an influenza vaccine but instead of influenza virus it's coronavirus...that one is scary because they've tried it before and it had some bad side effects when people caught the virus itself. The double Blind tests show that it's 70% effective but I haven't heard much about the 30% who got sick...as if it was a severe case or if it was treatable or not. Coronavirus can be a somewhat tricky virus.
There's at least 17 other Vaccines coming through the pipeline at the moment. Besides the wall street darlings (Novovax and J&J) there are others that are coming soon.
So...by the time we get there...we will have several to choose from and even higher numbers of efficacy and more accurately if and when there are real side effects or not.
I'm okay with being a test dummy at this point with many of the various Vaccines...
Fast track was just a method of removing risk and paperwork so they can get these to market faster. They provided the money required for stage three trials, they did away with exposure to lawsuits from testing. (We are 4th stage trials)
But you don't get approval for 4th stage trials without being safe and only a one in a million chance of getting hurt by the Vaccine.
The few cases of Bells Palsy are strange...the timeline of affliction is way outside of the window for causation. (Over 50 days after last injection)