Routine blood test also called as complete blood count (CBC) is a type of blood test. It is used to examine general health and identify a variety of illnesses, such as leukaemia, anaemia, and infections.

The following are the results of a full blood count test:
RBC ( Red Blood Cell)–  Carries oxygen.
WBC (White Blood Cell)– Infection  fighting cells.
Platelet– Helps in blood clotting
Hb long form is hemoglobin, it is the oxygen-carrying protein in red blood cells.
Hematocrit is the percentage by volume of red cells in your blood.

Uses-

A common blood test that is frequently included in a normal visit is a complete blood count. Complete blood counts can be used to identify a number of conditions, such as infections, anaemia, immune system problems, and blood malignancies.

Diagnosis of disease– Finding the source of symptoms such as weakness, exhaustion, and fever might be assisted by a complete blood count. Additionally, it can help in determining what is causing any bleeding, bruising, or discomfort.

Health condition assessment– Monitoring conditions that alter blood cell counts can be aided by a full blood count.

Success medical treatment– A complete blood count can be used to monitor the effects of radiation and medications that alter blood cell counts.

Check for changes in an existing blood disorder.

Blood collection- 

You can eat and drink normally before the test if only a complete blood count  is being performed on your blood sample. You might need to fast for a specific amount of time before to the test if your blood sample will also be utilized for other testing. Find out what you should do by asking your doctor.
A tiny needle will be used by a medical practitioner to draw blood from a vein in your arm. A small amount of blood will be collected into a test tube or vial once the needle has been placed. The needle may sting somewhat when it enters or exits your body. Normally, this takes within five minutes.

Components of Reports-

Hemoglobin

RBC count

TLC ( Total leukocyte count )

DLC ( Differentail leukocyte count )- Neutrophils, Eiosinophils, Basophils, Lymphocytes and Monocytes

MCV

MCH

MCHC

RDW