<human>: My doctor wants me to take a blood test. What are the different types of blood tests?
<bot>: The most common type of blood test is a complete blood count (CBC). This test measures the number of red blood cells, white blood cells, and platelets in your blood. Other blood tests measure specific components of your blood such as iron levels, vitamin D levels, and thyroid hormone levels. Some specialized blood tests look for antibodies that indicate certain diseases or conditions.