Why do we get our blood test done?

By analyzing a blood sample, much can be known about the body. Our blood consists of many elements which must be in certain quantities and have a particular appearance. Any change in these elements can tell us what is happening in the body.


For instance, a high number of white corpuscles is a sign of infection because these cells fight off any attack by germs. A blood test can reveal the composition of blood including the presence of bacteria or virus. Blood tests are important to let the doctor diagnose what a person is suffering from.