When performing an Antibody Screen or an Antibody ID Panel, during the AHG phase why are the rbcs in the tubes washed 3 times before adding AHG reagent?

The antibody that may be a weak level in the patient’s serum and give a false negative antibody screen and is a cause of delayed hemolytic transfusion reactions would most likely be:

A mother who has the blood type O and a father who has the blood type A could have children with the following genotypes: (do not include the subgroups for this question)

The antigenic determinant that both C and D have is:

A patient has the phenotype 0, DCce.  If transfused with blood from six random group O Rh positive donors, the patient could theoretically produce which of the following antibodies:

Which antibody type will readily cross the placenta?

Looking at the antibody screening results for Patient 4, what class of antibody is most likely? Image 70_E3(1).jpg

How long is the deferral period for an individual that has had an accidental needle-stick/ bloodborne pathogen exposure well working in a healthcare setting? 

Which antibody type reacts best at AHG Phase?

What is the blood group of patient 5? Image 3(4).png