Yes there are only 15% of All population with RH- BloodType. RH- very special Blood..A Rh- and B Rh- very special people: seeking TRUTH, don't tolerate fakers ,they see when people lie or want to use them, they eat all information ,like to be vigilant and search ,dig and discover answer. Usually those people don't have much support from Family, because They don't leave by "Man Law. " they trying to live by The Yahweh commandments ,which was written in their hearts.
Thus says the Lord, your Redeemer,
who formed you from the womb:
“I am the Lord, who made all things,
who alone stretched out the heavens,
who spread out the earth by myself,
Isaiah 44:24; 49:15; Psalm 71:6; Jeremiah 1:5
Galatians 1:15