For our testing on the Galileo, we also have previous patient history; either a historic type or if the patient is new, a type check before the sample is placed on the Galileo. If someone turns up Rh negative on the Galileo, the sample is repeated on the bench with the Weak D in mind. We have seen this frequently enough, that we now have a code that we add to our LIS that alerts our techs that the patient is a historic weak D and the ABO testing is then done manually. The Immucor D4 reagent is suppose to pick up weak D's better, but we know from our experience that it misses weak D's.