No coronavirus vaccine (especially β-cov) will ever be safe and effective, as an ordinary person would define the terms.
Hold that thought, since there are over 200 candidates and three of them have already passed phase 1 and phase 2 clinical trials in the US and are now actively in phase 3.
President Trump says we’ll have one very soon. I’m guessing he’ll be announcing it in October. I’ll come back and ask about this then.