In the past few years I have been receiving several emails from people stating that their blood types have been diagnosed differently in different tests. This is not uncommon. Here are the 4 reasons why you may have gotten different results in your tests: 1) Human error It is very sad, but human error does top this list. Doctors and nurses are often overworked and these things can happen. One prime example is where out of 262 active duty Air Force personnel, eleven errors in blood type information were identified, including seven Rh type errors and six ABO typing errors. If you have had two different results from two different tests, find a third place to get your blood type … Continue reading 4 major reasons why blood type tests can show different results