I hadn't heard of him but perhaps I should have done. What a hero!
Many years ago I was found to be RhNeg when I was pregnant with my 2nd child, the first having been miscarried. However, the Consultant was relieved to know that DH was also RhNeg, consequently all our children are too.
Rhesus disease only happens when the mother has rhesus negative blood (RhD negative) and the baby in her womb has rhesus positive blood (RhD positive). The mother must have also been previously sensitised to RhD positive blood.
Sensitisation happens when a woman with RhD negative blood is exposed to RhD positive blood, usually during a previous pregnancy with an RhD positive baby. The woman’s body responds to the RhD positive blood by producing antibodies (infection-fighting molecules) that recognise the foreign blood cells and destroy them.
NHS