The reason they’re aiming for human vs fowl is that, much like undercooked beef, the disease is in the chicken’s/turkey’s bowels … and with the mass butchering of millions of animals contamination is almost inevitable (I used to work on a turkey farm).
Seems they’ve been working for some time on a human salmonella vaccine (possibly oral) for a while now, but nothing yet.
https://academic.oup.com/cid/article/71/Supplement_2/S151/5877830?login=false
The reason they’re aiming for human vs fowl is that, much like undercooked beef, the disease is in the chicken’s/turkey’s bowels … and with the mass butchering of millions of animals contamination is almost inevitable (I used to work on a turkey farm).