Here is a link to the vaccination project that Dr. Ronald Schultz is currently working on:
https://www.rabieschallengefund.org/
They released an update on January 25, 2018:
Quote:
Rabies Challenge Fund Update - January 25, 2018
UPDATE from Dr. Ronald Schultz: "Results to date of The Rabies Challenge Fund research study showed protection from live rabies virus challenge five years after the dogs received 2 doses of rabies virus vaccine. Other data are still being collected and analyzed for the 6.5 and 7-year post-vaccination periods."
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Those are promising results. It does take time to do the research, though, and this study is only being conducted on the rabies vaccination.