The complete blood count (CBC) test is type of blood test that helps to diagnose: overall health of a person, any ongoing treatment's prgress, if a person is suffering from anemia, blood disorder, lukimia and any other infection.
There is no precaution required before the test. But if the test is accompaning any other test, you will need to fast before taking the test. Besides, to improve your test results you should start a healthy diet. You need to include iron and vitamin rich food in your daily diet and more intake of fluids and water.
Depending on your test results, the doctor will prescribe you medication, lifestyle changes and any further treatment if required.