Robert and I are both carriers of the Krabbe mutation, 1
out of roughly 150 people carry a Krabbe mutation. Obviously, we are
non-affected, as we both are carriers of the infantile onset (symptoms
start before 6 months old) form of the gene. We had no idea until
William was diagnosed. We had a 1/4 chance of having a child like
William, an affected carrier. See picture below.