It's astonishing to me they could cobble together something so quickly, and I'm sure 'cobble' probably isn't the right word (this is science!). But I don't think we have years. God, please don't let it be years.
I give the CDC (who is involved in this) and other agencies great credit.
It took 12 years (2003-2015) for China to come up with a SARS vaccine ready to test. But since SARS was eradicated before 2015, no human testing was done. Just for comparison. SARS-CoV-2 (official designation of the new virus) so far is less lethal than the 40% of SARS, but is way easier to catch/spread. 5 to 800 in a week in South Korea, primarily because of one woman, who had no contact with China.
Be ready to bunker in place, and don’t be surprised if this takes longer than estimated to arrive, to be reported, to peak, and to be over.