There's more information in one of the linked articles [1]. Apparently some very small percentage of Rh-negative people have an enzyme which allows them to acce

There's more information in one of the linked articles [1]. Apparently some very small percentage of Rh-negative people have an enzyme which allows them to accept Rh-positive blood; that's the "anti-D" factor which saves these lives. [1] https://www.lifeblood.com.au/blood/learn-about-blood/plasma/anti-D https://www.lifeblood.com.au/blood/learn-about-blood/plasma/...