The control center of the body is the

Brain

Explanation:

Brain is the control center with most of the nervous system going up and down from your brain.  through your nerves.

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.