the vaccine, which it invented a few years ago,
And we are just hearing about it now?
With only 1500 doses, either those well off and well connected will get it, and if so, they'd want it kept quiet (or be subject to riots, which could spread the disease further through the population).
Then, too, it is an animal vaccine and would only be accepted for use on humans in the most dire of emergencies, (which I think an argument can be made for in parts of Africa about now).
Keep in mind It may not be effective in humans.
There haven't been any outbreaks lately to go try it on until this one.