Forget mainstream media, propaganda (one way or another) and just focus on first principles.
The risk-reward of a healthy person was skewed to the downside. The virus is new and the vaccine is experimental and new.
It doesn't take a genius to look at the history of medicine and the amount of blunders there have been in order to be skeptical of taking an artificially-created vaccine that most importantly has not been tested for years.
One must trust the human body's ability to defend itself.