Israeli efforts:

https://nypost.com/2020/02/28/israeli-scientists-claim-to-be-weeks-away-from-coronavirus-vaccine/

Sample quote

The researchers discovered that the poultry coronavirus is very similar genetically to the human one — and that it uses the same infection method, Katz said.

“All we need to do is adjust the system to the new sequence,” he said. “We are in the middle of this process, and hopefully in a few weeks we will have the vaccine in our hands. Yes, in a few weeks, if it all works, we would have a vaccine to prevent coronavirus.”

The oral vaccine will have to go through a regulatory process, including clinical trials, he noted.

End quote