What is the Function of A Blood Test?

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A blood test is a lab analysis performed on a blood sample. It is often used in health care to determine physiological and biochemical states. Functions include but  not limited to finding disease, testing drug effectiveness and organ function. The blood test is acquiring an increasing importance nowadays. As the related study being carried forward, it will be possible that  blood test or urine test can be used to spot cancer. Keywords: blood test; blood tests; blood urine