Of course there are ongoing projects aimed at developing vaccines, and of course they are based upon understanding the genome of the virus. That does not mean that anyone knows the "required makeup" of a vaccine, only that there is data available to point researchers in the right direction.
No vaccine is "in production." No vaccine will be "in production" until one is formulated and tested for safety and efficacy, first in cell culture, then in animals and finally in humans.
This article provides solid and sensible information on the issue and is easy to understand:
How Long Will it Take to Develop a Vaccine for Coronavirus?
Note that one company asserts that it will have a vaccine ready for testing in humans within a month. That's a pretty bold claim (you can be pretty certain that it is aimed at investors at least as much as any other audience) and, even if it turns out to be accurate, the testing referred to is a phase one trial.
Here, from the US National Institutes of Health, is a quick overview of the phases of clinical trials:
Edit: A study from Germany that's just making the rounds appears to contradict the WHO observation, from yesterday, that transmission from asymptomatic carriers may be rare.
Letter to the New England Journal:
CNN story with comments by Anthony Fauci (who is definitely the real deal in epidemiology):