Is it permissible for a man afflicted with vitiligo to marry relatives, knowing that the chance of the disease being transmitted in this case is 25%, while the chance significantly decreases or becomes non-existent when marrying non-relatives?

It is permissible to marry relatives or non-relatives. However, marrying non-relatives is preferred if it is scientifically proven to reduce infection, unless this conflicts with a predominant interest. The other party must be informed of the existence of vitiligo (leprosy) because it necessitates the option [of annulment].