Similarly like with the car, which needs regular check-ups, so does our body. Visiting a family doctor and scheduling blood examination every half year prevents deficiencies of micronutrients and vitamins, that are so crucial in the functioning of the immune system.
Apart from that, changes in the blood can indicate pathological processes going on inside the organism. Early detection of those processes is priceless in the diagnostic and treatment of harmful conditions. Not only it can speed up the recovery but also prevent many serious complications from developing.