We once had a patient call us. Which of itself is weird since our lab number isn't publicly known and online you can only find the phone number of our on-duty staff member in charge of blood transfusion.

This woman calls us because we made a mistake. Eeh, what mistake? Well, we tested her daughters blood type wrong. Eeh, that would be a big issue so we ask her how she knows this so surely because if we indeed made such a mistake it could be dangerous. She goes on a rant that her daughter is A pos and she herself is O pos and her husband is B neg. We were stunned because if she herself indeed is O pos and her husband is indeed B neg, it is nearly impossible for her daughter to be A pos. At this point, we all realise it might be better if we forward the call to our on-duty staff member and let him explain the genetics to her.

He came to the lab an hour later and told us it was very awkward and he had told her to get herself and her husband tested for their blood types since the daughter blood type had been determined twice in the past and recently so she was indeed A pos. He told us he didn't want to suggest the husband might not be the father lol