I get it done about every year or 18 months,,,,just one suggestion...

Get typed every time you get a blood test. It will cost extra to do this and the places that draw blood and even your doctor will tell you to save your money and will try to talk you out of it but it might help ensure that your blood test results are yours..

for example I am A negative and if my results come back anyother type then I know there was a mix up......if you think they can't mix them up then just go visit a blood lab...

Study hard for that test