Twice in all of history, humans have managed to eradicate a devastating disease. You've heard of the first one, I suspect: smallpox. But rinderpest?
That's a German word for "cattle plague" a feared companion of cattle throughout history. When outbreaks occurred, as in Europe of the 1700s or Africa in the 1880s, entire herds were wiped out and communities went hungry. Now the disease is gone, eliminated from the face of the earth.