Only in very rare circumstances and with certain forms of cancer present. The most common cause of seemingly changed blood types is the antigen sensitivity of the chemicals used to test the blood. Drugs or other factors about your blood may cause an erroneous readings. Operator error or poor lighting can result in an incorrect interpretation of the test results.
Affordable, FDA-approved kit that comes complete with everything you need to determine your blood type, including instructions, finger lancet and alcohol prep, plastic applicator sticks and testing card.
