There are right now possibly four major strains of Covid-19 coronavirus (Strain S and Strain L have been confirmed by China). There were 118 mutated minor strains as of 7 March in just the USA alone.
The idea that a vaccine will be ready is laughable because the HIV vaccine (also an RNA virus) has taken 30+ years. See “Why is there no HIV vaccine yet?“
RNA viruses are usually immune to generalized vaccines because they mutate so fluidly. Covid-19 is unique in this regard, because while it mutates readily, it seems to be much more stable than other novel RNA viruses (such as Ebola, Dengue Fever, etc.).
Google “personal peptide vaccine” for the alternative, but because it requires 1) access to a genetic sequencer for your own DNA and 2) a biolab with enough spare freetime to generate the vaccine for you.
Still, there is supposedly an open sourced personal peptide vaccine for Covid-19 that was posted (leaked??) to GitHub on 31 January 2020.
Oh, and the Common Cold is also a coronavirus. Scientists have been trying to develop a vaccine for it for over a hundred years. Hopefully, with the entire bioscience industry focused on covid-19, they will have much better luck. See “Why There Will Never Be A Cure For The Common Cold“.
But I am personally not counting on it. The only thing that will cause this pandemic to die down are Draconian measures that enforce strict 40 day quarantines that reset on the first sign of symptoms.