Confirmatory Tests vary, and may be wrong from time to time. As time passes, the test is not as reliable as stated. If the so called "blood" is on a leather surface, blood isn't too prone to sticking to leather, so it may (or may not) be blood.
Answer:
no blood is not suitable for donation as it will clot too much in the recipient patient and can cause severe problems.
Explanation:
I think the answer is to give the patient a healthy dose of cosine
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