Vitiligo is a pigmentation disorder that appears as white patches on the skin. About 1 million Americans have it.
This modified protein was tested on mice with vitiligo.
The results were striking. The mice fur before the treatment had the coloring of a salt and pepper beard.
But, after they were vaccinated, the mice's fur turned black.
Currently, there are no long-term effective treatments. It is hoped human trials will prove it works.