There are only 7 coronaviruses known to infect humans. 4 of them are among the over 200 viruses known to cause mild symptoms we collectively refer to as the common cold. Nobody’s funding vaccine development for those because nobody’s going to pay for a vaccine that costs that much (to cover all the various viruses in various families involved).
The other three coronaviruses are SARS-CoV-1 (SARS 2003), MERS-CoV (MERS 2012), and SARS-CoV-2 (COVID-19). We developed apparently working vaccine candidates for SARS 2003 and MERS 2012 that made it through phase 1 and phase 2 human trials. However, those diseases burned out quickly (they killed people too fast and spread too slow) and so without any patients left (and thus no market for a vaccine), no funding was available for the massively expensive phase 3 trials.
The final coronavirus is SARS-CoV-2, which is very similar to SARS 2003, except it spreads much better and kills much slower and less often. There’s all the funding in the world to make phase 3 trials happen. In fact, three are in progress right now in the US and several others are in phase 3 trials in other countries. Phase 3 trials test the vaccine candidate on tens of thousands of volunteers over the course of months. This after hundreds or thousands have already tested it in phase 1 and phase 2 human trials.
We’re following the same protocols for safety and efficacy testing with COVID-19 vaccines as we do for any other new drug or vaccine. If it passes phase 3 trials, rest assured we know it’s safe and that it works.
As you can see by my tagline, I am never assured that they are safe and don’t trust these people as far as Dr. Fauci can throw a baseball.