My blood tape change how this is possible?

Question

i was born with blood tape 0 RH(-) but yesterday i find out my blood now is A(-) ...its just freaks me out...what this mean and how its possible?

Answer 1

I googled your question and found that no, your blood type can not change. One of the test may have been wrong. here is the site I found.

http://wiki.answers.com/Q/Is_it_possible...

I also found this:

Can a person's blood type change?

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.

http://www.dadamo.com/faq/smartfaq.cgi?a...

Answer 2

It may be possible that one of the two tests was invalid.  While my sister was in biology, the class tested their blood types.  Her's came back type O, which is impossible in my family since my mom has type AB

Answer 3

An enzyme modifies the H-antigen (type O) to A.  Some people have variants that express differently.