OK, I don't have all of the information, but my neighbor came down with a blood disorder and requires frequent blood trans.
She was one of three people that received O type blood, all became very ill after, one critical. They searched back to the donors and the only common thing was "probiotic use". My friend was told they suspect that the probiotics may have altered the donors blood chemistry and the blood type went from O to Anti A. Has anyone ever heard of such a thing? She remained in the hospital for 6 days and had to flush her system.