You can't.
The best you can do it give injections of gamma globulin, the serum (blood) protein fraction that contains antibodies and so helps to fight infection.
Bruton's agammaglobulinemia
X-linked agammaglobulinemia
Agammaglobulinemia is a condition in which gammaglobulins are absent from the blood, or only exist in low concentrations.
Swiss-type agammaglobulinemia. This was the first type of SCID discovered, in Switzerland in the 1950s.
X-linked agammaglobulinemia
Yes
It is present at birth
Normal
Swiss-type agammaglobulinemia. This was the first type of SCID discovered, in Switzerland in the 1950s. (SCID) is the most serious human immunodeficiency disorder(s).
It is present at birth
It is caused by a defect in the gene that codes for Btk
It is an enzyme vital for the maturation of B cells