Do I really need to have these blood tests?.If you have been referred for blood tests, you might ask: This information helps you understand what is involved. Blood tests are generally accurate, but they're not perfect. Related information on Australian websitesīlood tests can be used to assess your general health, as well as help your doctor diagnose or monitor a range of conditions.What are the different types of blood tests?.Are there any risks or side effects from having a blood test?.How long does it take to get a blood test?.