In response to those that are concerned about COVID vaccines being experimental: They don’t call it the “practice” of medicine for nothing. Even medicines that are “officially” approved by the FDA can have complications. The positive impact thus far in turning the pandemic the other direction is proof enough these vaccines work and are worth it.
Do we know the long-term affects? No. Was the world to wait for herd immunity? How many months or even years? There have been almost 8,000 medications recalled between January 2013 and October 2018. FDA approval has its limits.