Even if there are unforeseen side-effects, or if the efficacy of the vaccine is not as good as expected, its highly unlikely it will lead to widespread problems or downright failure. The fact that there are several competing vaccines developed independently is also another safeguard.

Of course, its always possible that its all an untested, hastily-concocted effort doomed to failure or an elaborate conspiracy designed to further some villain's goals of world domination, but I think either is highly unlikely.

Ironically, one of the few worthwhile things Trump can be credited for, rushing the development of Covid vaccines, will probably never be fully acknowledged because of his failure to take the pandemic seriously and his assault on those who did. Instant Karma: Biden will get the credit if it works, and Trump will be blamed if it doesn't. And maybe that's the way it should be.

I believe the odds are way in favor the vaccine program will save many lives and return society to some semblance of normalcy. Its not that I believe Trump is incapable of carrying out an elaborate conspiracy, I just don't think he had the competence to pull it off.

I have personally made the calculation that I am much more likely to have my life saved by getting the shot as soon as possible than I am to survive by delaying it until "all the facts are in".