From Webster's On-line

CARRIER: 5 a : a bearer and transmitter of a causative agent of an infectious disease; especially : one who carries the causative agent of a disease (as typhoid fever) systemically but is immune to it b : an individual (as one heterozygous for a recessive) having a specified gene that is not expressed or only weakly expressed in its phenotype

debils: No doubt your ggg. infected many othres and also passed the "folk gene" through the generations in your family.