This is Dr. David
you have to see your doctor for blood testing to find out your blood type.
you can also go and donate blood and they can tell you what blood type your blood is.
you can also purchase online home blood type kits like this which can help you find your blood type.
let me know if you have other questions.
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you can always reach me directly with "a question for Dr. David" in the medicine or oncology categories if you have other questions
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