A blood test is the most common diagnostic test that is performed as part of a normal routine medical exam or to look for viruses or bacteria that are causing the patient discomfort. Blood tests are a bit painful, and patients with undiagnosed conditions are exposed to tremendous stress before reviewing test results. https://bestcaremedicalclinic.wordpress.com/2021/10/30/things-you-must-know-before-the-blood-test/