No serious side effects were reported, though the trials are too small to detect rare conditions
That's the catch, isn't it? I make my living doing SPC ("Statistical Process Control".) In statistical jargon, this is called "Beta," the statistical power to detect an effect, assuming, of course, that it is present to begin with. In other words, this vaccine could,
in theory, cause some terrible illness a decade or two down the road, effect pregnancies, etc. It won't kill you now, and
probably won't kill you later on, but "we" (the scientists) are not sure. Problem with vaccines is that they are not 100% effective to begin with. You may get the shot and still get the disease and die from it. This is the
de facto example of government bureaucrats deciding,
for you, who lives and who dies.