It's less confidence and more I take what I read from both sides with a grain of salt, as well as try to see if what I am seeing matches up with what can be proven. In the case of the vaccine, I think we can reasonably establish that the concerns for it are valid in that we are dealing with something that is in late stage trials and has yet to be given FDA approval. Now hesitancy for it is reasonable given it's still new, but I do not think the scaremongerers/doomers are necessarily correct given that you have had a number of trustworthy figures(Trump, the first family, and a number of his inner circle receive/promote it and even push for it with OWS). Given that the man has worked tirelessly for the American people, I doubt he would push for something that would result in tens of millions of Americans dying. At any rate, I will just conclude with this: Use your own best judgement on what to do regarding it and try to seek out the facts for yourself rather than relying on fear or rumor.